India's newly elected President Pranab Mukherjee (in black) and outgoing President Pratibha Patil wave as Patil's husband Devisingh Shekhawat (3rd L) smiles, at India's presidential palace Rashtrapati Bhavan in New Delhi July 25, 2012. Mukherjee, former finance minister and senior leader of the ruling Congress party, was sworn in on Wednesday as India's 13th president. REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

India's outgoing President Pratibha Patil (in car, white) waves to the members of her presidential staff at India's presidential palace Rashtrapati Bhavan in New Delhi July 25, 2012. Pranab Mukherjee, former finance minister and senior leader of the ruling Congress party, was sworn in on Wednesday as India's 13th president. REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

India's outgoing President Pratibha Patil waves to photographers at India's presidential palace Rashtrapati Bhavan in New Delhi July 25, 2012. Pranab Mukherjee, former finance minister and senior leader of the ruling Congress party, was sworn in on Wednesday as India's 13th president. REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

India's outgoing President Pratibha Patil (C) poses for a picture with her members of staff during the "At Home" reception for lawmakers at India's presidential palace, Rashtrapati Bhavan, in New Delhi July 22, 2012. Pranab Mukherjee, former finance minister and senior leader of the ruling Congress party, has been elected as the new president, a government official said on Sunday. REUTERS/B Mathur (INDIA - Tags: POLITICS ELECTIONS) 

India's outgoing President Pratibha Patil (C) and her husband Devisingh Shekhawat (L), gestures to guests during the "At Home" reception for lawmakers at India's presidential palace, Rashtrapati Bhavan, in New Delhi July 22, 2012. Pranab Mukherjee, former finance minister and senior leader of the ruling Congress party, has been elected as the new president, a government official said on Sunday. REUTERS/B Mathur (INDIA - Tags: POLITICS ELECTIONS) 

India's outgoing President Pratibha Patil (R) speaks with Indian Prime Minister Manmohan Singh during the "At Home" reception for lawmakers at India's presidential palace Rashtrapati Bhavan in New Delhi July 22, 2012. Pranab Mukherjee, former finance minister and senior leader of the ruling Congress party, has been elected as the new president, a government official said on Sunday. REUTERS/B Mathur (INDIA - Tags: POLITICS ELECTIONS) 

India's outgoing President Pratibha Patil waves to photographers during the "At Home" reception for lawmakers at India's presidential palace, Rashtrapati Bhavan, in New Delhi July 22, 2012. Pranab Mukherjee, former finance minister and senior leader of the ruling Congress party, has been elected as the new president, a government official said on Sunday. REUTERS/B Mathur (INDIA - Tags: POLITICS ELECTIONS) 

India's outgoing President Pratibha Patil (C), surrounded by her bodyguards, arrives to attend a reception for lawmakers at Rashtrapati Bhavan, the presidential palace, in New Delhi July 22, 2012. Pranab Mukherjee, former finance minister and senior leader of the ruling Congress party, has been elected as the new president, a government official said on Sunday. REUTERS/B Mathur (INDIA - Tags: POLITICS ELECTIONS) 

India's President Pratibha Patil (L) shakes hands with Singapore's Prime Minister Lee Hsien Loong before their meeting at the presidential palace in New Delhi July 11, 2012. Lee is on a three-day state visit to India. REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

India's President Pratibha Patil (R) speaks with Singapore's Prime Minister Lee Hsien Loong during their meeting at the presidential palace in New Delhi July 11, 2012. Lee is on a three-day state visit to India. REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

Indian Prime Minister Manmohan Singh (C) speaks with Finance Minister Pranab Mukherjee (L), as Chief of India's ruling Congress party Sonia Gandhi watches, during a function held on the completion of the government's three years in office in New Delhi May 22, 2012. When Pratibha Patil leaves office in July and a new president is elected for the next five years, India may, for the first time since it became independent 65 years ago, have a president with political clout. That power will flow from a prerogative that effectively gives the president a casting vote when no one political party has a clear mandate to rule - the likely outcome of the next national elections due by 2014. A politically driven president - and the leading contender for the job, current Finance Minister Mukherjee, is certainly that - could also take advantage of India's vaguely worded constitution to influence legislation in a parliament splintered by many parties and alliances. He could also use his power to dissolve an impossibly fractured parliament, and delay or even scupper legislation by withholding the required presidential assent. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/B Mathur (INDIA - Tags: POLITICS BUSINESS) 

Indian Prime Minister Manmohan Singh (R) speaks with Finance Minister Pranab Mukherjee during a function held on the completion of the government's three years in office, in New Delhi May 22, 2012. When Pratibha Patil leaves office in July and a new president is elected for the next five years, India may, for the first time since it became independent 65 years ago, have a president with political clout. That power will flow from a prerogative that effectively gives the president a casting vote when no one political party has a clear mandate to rule - the likely outcome of the next national elections due by 2014. A politically driven president - and the leading contender for the job, current Finance Minister Mukherjee, is certainly that - could also take advantage of India's vaguely worded constitution to influence legislation in a parliament splintered by many parties and alliances. He could also use his power to dissolve an impossibly fractured parliament, and delay or even scupper legislation by withholding the required presidential assent. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/B Mathur (INDIA - Tags: POLITICS BUSINESS) 

India's Finance Minister Pranab Mukherjee waits for a function, held on the completion of the government's three years in office, to begin in New Delhi May 22, 2012. When Pratibha Patil leaves office in July and a new president is elected for the next five years, India may, for the first time since it became independent 65 years ago, have a president with political clout. That power will flow from a prerogative that effectively gives the president a casting vote when no one political party has a clear mandate to rule - the likely outcome of the next national elections due by 2014. A politically driven president - and the leading contender for the job, current Finance Minister Mukherjee, is certainly that - could also take advantage of India's vaguely worded constitution to influence legislation in a parliament splintered by many parties and alliances. He could also use his power to dissolve an impossibly fractured parliament, and delay or even scupper legislation by withholding the required presidential assent. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/B Mathur (INDIA - Tags: POLITICS BUSINESS) 

A man walks in front of India's presidential palace Rashtrapati Bhavan at dusk in New Delhi May 22, 2012. Pratibha Patil wakes to the sound of trumpets and horse-backed riders in the cobbled courtyard of her magnificent palace in New Delhi, she walks on a treadmill, prays at her private temple and prepares for a long, hollow day. That's how it has been for Patil and her 11 predecessors as president of India: a grand office and an opulent home with liveried attendants, but almost no power. But that might change when Patil leaves office in July and a new president is elected for the next five years. For the first time since India became independent 65 years ago, it may have a president with political clout. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

People walk in front of India's presidential palace Rashtrapati Bhavan at dusk in New Delhi May 22, 2012. Pratibha Patil wakes to the sound of trumpets and horse-backed riders in the cobbled courtyard of her magnificent palace in New Delhi, she walks on a treadmill, prays at her private temple and prepares for a long, hollow day. That's how it has been for Patil and her 11 predecessors as president of India: a grand office and an opulent home with liveried attendants, but almost no power. But that might change when Patil leaves office in July and a new president is elected for the next five years. For the first time since India became independent 65 years ago, it may have a president with political clout. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

An Indian security personnel stands guard in front of the main gate of India's presidential palace Rashtrapati Bhavan at dusk in New Delhi May 22, 2012. Pratibha Patil wakes to the sound of trumpets and horse-backed riders in the cobbled courtyard of her magnificent palace in New Delhi, she walks on a treadmill, prays at her private temple and prepares for a long, hollow day. That's how it has been for Patil and her 11 predecessors as president of India: a grand office and an opulent home with liveried attendants, but almost no power. But that might change when Patil leaves office in July and a new president is elected for the next five years. For the first time since India became independent 65 years ago, it may have a president with political clout. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/Adnan Abidi (INDIA - Tags: POLITICS MILITARY) 

Monkeys are seen inside the complex of India's presidential palace Rashtrapati Bhavan at dusk in New Delhi May 22, 2012. Pratibha Patil wakes to the sound of trumpets and horse-backed riders in the cobbled courtyard of her magnificent palace in New Delhi, she walks on a treadmill, prays at her private temple and prepares for a long, hollow day. That's how it has been for Patil and her 11 predecessors as president of India: a grand office and an opulent home with liveried attendants, but almost no power. But that might change when Patil leaves office in July and a new president is elected for the next five years. For the first time since India became independent 65 years ago, it may have a president with political clout. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

A man walks in front of India's presidential palace Rashtrapati Bhavan at night in New Delhi May 22, 2012. Picture taken May 22, 2012. Pratibha Patil wakes to the sound of trumpets and horse-backed riders in the cobbled courtyard of her magnificent palace in New Delhi, she walks on a treadmill, prays at her private temple and prepares for a long, hollow day. That's how it has been for Patil and her 11 predecessors as president of India: a grand office and an opulent home with liveried attendants, but almost no power. But that might change when Patil leaves office in July and a new president is elected for the next five years. For the first time since India became independent 65 years ago, it may have a president with political clout. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/Adnan Abidi (INDIA - Tags: POLITICS) 

Local Indian tourists pose for pictures in front of the main gate of India's presidential palace Rashtrapati Bhavan at dusk in New Delhi May 22, 2012. Pratibha Patil wakes to the sound of trumpets and horse-backed riders in the cobbled courtyard of her magnificent palace in New Delhi, she walks on a treadmill, prays at her private temple and prepares for a long, hollow day. That's how it has been for Patil and her 11 predecessors as president of India: a grand office and an opulent home with liveried attendants, but almost no power. But that might change when Patil leaves office in July and a new president is elected for the next five years. For the first time since India became independent 65 years ago, it may have a president with political clout. Picture taken May 22, 2012. To match Analysis INDIA-POLITICS/PRESIDENCY REUTERS/Adnan Abidi (INDIA - Tags: POLITICS TRAVEL) 

(From L - R) Indian Prime Minister Manmohan Singh (in blue turban), Parliamentary Affairs Minister Pawan Kumar Bansal, Lok Sabha Speaker Meira Kumar, President Pratibha Patil and Vice President Mohammad Hamid Ansari walk during a procession upon their arrival to attend a function on the occasion of the 60th anniversary of Indian Parliament's first session in New Delhi May 13, 2012. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

India's Vice President Mohammad Hamid Ansari (4th R), President Pratibha Patil (5th R), Lok Sabha Speaker Meira Kumar (in pink sari), Parliamentary Affairs Minister Pawan Kumar Bansal (in white) and Prime Minister Manmohan Singh (in blue turban) walk during a procession upon their arrival to attend a function on the occasion of the 60th anniversary of Indian Parliament's first session in New Delhi May 13, 2012. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

India's President Pratibha Devisingh Patil speaks during a news conference in Pretoria May 2, 2012. Patil is on a state visit to South Africa for bilateral discussions. REUTERS/Siphiwe Sibeko (SOUTH AFRICA - Tags: BUSINESS POLITICS) 

India's President Pratibha Devisingh Patil (L) listens to South African President Jacob Zuma as he speaks during a news conference in Pretoria May 2, 2012. Patil is on a state visit to South Africa for bilateral discussions. REUTERS/Siphiwe Sibeko (South Africa - Tags: BUSINESS POLITICS) 

India's President Pratibha Devisingh Patil (R) inspects the guard of honour during her state visit to South Africa for bilateral discussions with South African President Jacob Zuma in Pretoria May 2, 2012. REUTERS/Siphiwe Sibeko (South Africa - Tags: BUSINESS POLITICS) 

India's President Pratibha Devisingh Patil (C) arrives with South African President Jacob Zuma (R) during her state visit to South Africa for bilateral discussions in Pretoria May 2, 2012. REUTERS/Siphiwe Sibeko (South Africa - Tags: BUSINESS POLITICS) 

India's President Pratibha Devisingh Patil (L) looks on with South African President Jacob Zuma during her state visit to South Africa for bilateral discussions in Pretoria May 2, 2012. REUTERS/Siphiwe Sibeko (South Africa - Tags: BUSINESS POLITICS) 

India's President Pratibha Devisingh Patil (C) inspects the guard of honour during her state visit to South Africa for bilateral discussions with South African President Jacob Zuma in Pretoria May 2, 2012.
REUTERS/Siphiwe Sibeko (South Africa - Tags: BUSINESS POLITICS) 

India's President Pratibha Devisingh Patil (L) inspects the guard of honour during her state visit to South Africa for bilateral discussions with South African President Jacob Zuma in Pretoria May 2, 2012.
REUTERS/Siphiwe Sibeko (South Africa - Tags: BUSINESS POLITICS) 

Brazil's President Dilma Rousseff shakes hands with her Indian counterpart Pratibha Patil (R) during her ceremonial reception at the presidential palace in New Delhi March 30, 2012. Rousseff is on a five-day state visit to India. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

Indian President Pratibha Patil (L) administers the oath to Mukul Roy as new Railway Minister at the presidential place in New Delhi March 20, 2012. Roy was sworn-in on Tuesday as Railway Minister to replace his party colleague Dinesh Trivedi. Trivedi quit on Sunday after his announcement of an increase in passenger fares in last week's railway budget prompted a furious response from his Trinamool Congress party. REUTERS/B Mathur (INDIA - Tags: POLITICS BUSINESS TRANSPORT) 

India's President Pratibha Patil (C) speaks with European Council President Herman Van Rompuy (L) as European Commission President Jose Manuel Barroso watches during their meeting at India's presidential palace Rashtrapati Bhavan in New Delhi February 10, 2012. The European Union has asked India to use its leverage to bring Iran to the negotiating table over its nuclear programme, Rompuy said on Friday, as Asia's third-largest economy prepares to increase trade with Tehran. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

India's President Pratibha Patil (2nd L) shakes hands with European Council President Herman Van Rompuy as his wife Geertrui Van Rompuy (R) and European Commission President Jose Manuel Barroso look on, before their meeting at India's presidential palace Rashtrapati Bhavan in New Delhi February 10, 2012. The European Union has asked India to use its leverage to bring Iran to the negotiating table over its nuclear programme, Rompuy said on Friday, as Asia's third-largest economy prepares to increase trade with Tehran. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

India's President Pratibha Patil (C) salutes at the Mahatma Gandhi memorial on Gandhi's death anniversary at Rajghat in New Delhi January 30, 2012. Mahatma Gandhi, father of the Indian nation, was assassinated in 1948. India observes Gandhi's death anniversary as Martyrs' Day. REUTERS/B Mathur (INDIA - Tags: POLITICS OBITUARY ANNIVERSARY) 

Indian Prime Minister Manmohan Singh (in blue turban) greets India's President Pratibha Patil (C), surrounded by bodyguards, upon her arrival to attend the "Beating the Retreat" ceremony in New Delhi January 29, 2012. The ceremony symbolises retreat after a day on the battlefield, and marks the official end of the Indian Republic Day celebrations and is held every year on January 29. REUTERS/B Mathur (INDIA - Tags: MILITARY ANNIVERSARY) 

Thailand's Prime Minister Yingluck Shinawatra (2nd L) and Indian President Pratibha Patil (C) greet guests during the "At Home" reception at India's presidential palace Rashtrapati Bhavan after the Republic Day parade in New Delhi January 26, 2012. This year, Yingluck was the chief guest at the India's 63rd Republic Day parade. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

Thailand's Prime Minister Yingluck Shinawatra (C) takes snacks as her Indian counterpart Manmohan Singh (2nd L), India's President Pratibha Patil (2nd R) and Singh's wife Gursharan Kaur (L) look on during the "At Home" reception at India's presidential palace Rashtrapati Bhavan after the Republic Day parade in New Delhi January 26, 2012. This year, Shinawatra was the chief guest at India's 63rd Republic Day parade. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

Thailand's Prime Minister Yingluck Shinawatra (4th L), Indian Vice President Mohammad Hamid Ansari (3rd L), India's President Pratibha Patil (R) and Indian Prime Minister Manmohan Singh (in blue turban) are seated behind a bullet-proof glass as they watch the Republic Day parade in New Delhi January 26, 2012. Yingluck is on a three-day state visit to India and is a chief guest at India's 63rd Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

Thailand's Prime Minister Yingluck Shinawatra (3rd L) and Indian President Pratibha Patil (4th L) make their exit after attending the Republic Day parade in New Delhi January 26, 2012. Yingluck is on a three-day state visit to India and is a chief guest at India's 63rd Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

(From L - R) Indian Prime Minister Manmohan Singh, India's Vice President Mohammad Hamid Ansari, Thailand's Prime Minister Yingluck Shinawatra and India's President Pratibha Patil stand behind a bullet-proof glass during India's national anthem at the Republic Day parade in New Delhi January 26. 2012. Yingluck is on a three-day state visit to India and is a chief guest at India's 63rd Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

Thailand's Prime Minister Yingluck Shinawatra (4th L), Indian Vice President Mohammad Hamid Ansari (3rd L), India's President Pratibha Patil (L) and Indian Prime Minister Manmohan Singh (in blue turban) are seated behind a bullet-proof glass as they watch the Republic Day parade in New Delhi January 26. 2012. Yingluck is on a three-day state visit to India and is a chief guest at India's 63rd Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

Thailand's Prime Minister Yingluck Shinawatra (4th R) and India's President Pratibha Patil (3rd R) greet Indian Prime Minister Manmohan Singh (in blue turban) upon their arrival at the Republic Day parade in New Delhi January 26. 2012. Shinawatra is on a three-day state visit to India and is a chief guest at India's 63rd Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

Thailand's Prime Minister Yingluck Shinawatra (C), surrounded by bodyguards, shakes hands with her Indian counterpart Manmohan Singh (2nd L) as India's President Pratibha Patil (3rd R) looks on before the Republic Day parade in New Delhi January 26, 2012. Shinawatra is on a three-day state visit to India and is a chief guest at India's 63rd Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS ANNIVERSARY) 

Indian President Pratibha Patil (L) gestures to Thailand's Prime Minister Yingluck Shinawatra before their meeting at India's presidential palace Rashtrapati Bhavan in New Delhi January 25, 2012. Shinawatra is on a three-day state visit to India and will be the chief guest at India's Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

Thailand's Prime Minister Yingluck Shinawatra gestures to Indian President Pratibha Patil upon her arrival for their meeting at India's presidential palace Rashtrapati Bhavan in New Delhi January 25, 2012. Shinawatra is on a three-day state visit to India and will be the chief guest at India's Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

Indian President Pratibha Patil (R) speaks with Thailand's Prime Minister Yingluck Shinawatra during their meeting at India's Presidential Palace (Rashtrapati Bhavan) in New Delhi January 25, 2012. Shinawatra is on a three-day state visit to India and will be the chief guest at India's Republic Day celebrations on Thursday. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

India's Foreign Minister Somanahalli Mallaiah Krishna (R) and Saudi Arabia's Minister of Commerce and Industry Tawfiq Bin Fawzan Al-Rabiah pose as they shake hands before their meeting in New Delhi January 5, 2012. Photographs of India's President Pratibha Patil (L) and independence hero Mahatma Gandhi are seen on the wall behind. REUTERS/B Mathur (INDIA - Tags: POLITICS BUSINESS) 

A member of a social group holds a placard with a picture of Afzal Guru before burning it during a protest in the western Indian city of Ahmedabad December 13, 2011. Dozens of the members on Tuesday held a demonstration demanding the execution of Guru, who was convicted and sentenced to death by India's Supreme Court for an attack on the Indian parliament in December 2001. His execution has been kept on hold pending a clemency appeal before the president of India Pratibha Patil. REUTERS/Amit Dave (INDIA - Tags: POLITICS CIVIL UNREST) 

An activist from Hindu right-wing group Shiv Sena beats an effigy depicting Afzal Guru with a slipper during a protest in New Delhi December 13, 2011. The activists were demanding the execution of Guru, who was convicted and sentenced to death by India's Supreme Court for an attack on the Indian parliament in December 2001. His execution has been kept on hold pending a clemency appeal before the president of India Pratibha Patil. REUTERS/Parivartan Sharma (INDIA - Tags: POLITICS CIVIL UNREST) 

Activists from Hindu right-wing group Shiv Sena burn an effigy depicting Afzal Guru during a protest in New Delhi December 13, 2011. The activists were demanding the execution of Guru, who was convicted and sentenced to death by India's Supreme Court for an attack on the Indian parliament in December 2001. His execution has been kept on hold pending a clemency appeal before the president of India Pratibha Patil. REUTERS/Parivartan Sharma (INDIA - Tags: POLITICS CIVIL UNREST RELIGION) 

Activists from Hindu right-wing group Shiv Sena shout slogans while burning an effigy depicting Afzal Guru during a protest in New Delhi December 13, 2011. The activists were demanding the execution of Guru who was convicted and sentenced to death by India's Supreme Court for an attack on the Indian parliament in December 2001. His execution has been kept on hold pending a clemency appeal before the president of India Pratibha Patil. REUTERS/Parivartan Sharma (INDIA - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY RELIGION) 

U.S. Deputy Secretary of State William Burns arrives for a meeting with India's Foreign Minister Somanahalli Mallaiah Krishna in New Delhi December 12, 2011. A photograph of India's President Pratibha Patil is seen on a wall. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

Bhutan's King Jigme Khesar Namgyel Wangchuck and India's President Pratibha Patil (R) shake hands as India's Prime Minister Manmohan Singh (L) and Bhutan's Queen Jetsun Pema watch during Wangchuck's ceremonial reception at the presidential palace in New Delhi October 24, 2011. Wangchuck is on a nine-day state visit to India. REUTERS/B Mathur (INDIA - Tags: POLITICS ROYALS ENTERTAINMENT) 

Bhutan's King Jigme Khesar Namgyel Wangchuck (2nd R) and India's Prime Minister Manmohan Singh (L) shake hands as India's President Pratibha Patil and Bhutan's Queen Jetsun Pema (2nd L) watch during Wangchuck's ceremonial reception at the presidential palace in New Delhi October 24, 2011. Wangchuck is on a nine-day state visit to India. REUTERS/B Mathur (INDIA - Tags: POLITICS ROYALS ENTERTAINMENT) 

Myanmar's President Thein Sein (2nd R) extends his hand to Indian Prime Minister Manmohan Singh as India's President Pratibha Patil (R) and Sein's wife Khin Khin Win (in blue) watch during the ceremonial reception at India's presidential palace Rashtrapati Bhavan in New Delhi October 14, 2011. Sein is on a four-day state visit to India. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

Vietnam's President Truong Tan Sang (2nd R) shakes hands with his Indian counterpart Pratibha Patil as Indian Prime Minister Manmohan Singh (L) and Sang's wife Mai Thi Hanh watch during the ceremonial reception at India's presidential palace Rashtrapati Bhavan in New Delhi October 12, 2011. Sang is on a three-day state visit to India. REUTERS/B Mathur (INDIA - Tags: POLITICS) 

Austrian Chancellor Werner Faymann (R) welcomes Indian President Pratibha Devisingh Patil in his office during an official visit in Vienna, October 6, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: POLITICS) 

Indian President Pratibha Devisingh Patil arrives for an official visit at the Austrian presidential office in Vienna, October 5, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: POLITICS) 

Austrian President Heinz Fischer (R), his wife Margit (L), Indian President Pratibha Devisingh Patil (2nd R) and her husband Devisingh Ramsingh Shekhawat pose in front of a painting of former Austrian Empress Maria Theresia in the historic Hofburg palace in Vienna, October 5, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: POLITICS) 

Austrian President Heinz Fischer (R) welcomes Indian President Pratibha Devisingh Patil (C) and her husband Devisingh Ramsingh Shekhawat in his office in the historic Hofburg palace in Vienna, October 5, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: POLITICS) 

Austrian President Heinz Fischer (L) and Indian President Pratibha Devisingh Patil review the honour guard after Patil's arrival for an official visit in Vienna, October 5, 2011. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: POLITICS)