India's Prime Minister Manmohan Singh (C) and his wife Gursharan Kaur (R) show their ink-stained fingers after casting their votes at a polling station during the sixth phase of India's general election in the northeastern Indian city of Guwahati April 24, 2014. Around 815 million people have registered to vote in the world's biggest election - a number exceeding the population of Europe and a world record - and results of the mammoth exercise, which concludes on May 12, are due on May 16. REUTERS/Utpal Baruah (INDIA - Tags: POLITICS ELECTIONS)