Delhi's former chief minister and Aam Aadmi (Common Man) Party (AAP) chief Arvind Kejriwal (C) waves towards his supporters upon his arrival to file his nomination for the general election in the northern Indian city of Varanasi April 23, 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/Adnan Abidi (INDIA - Tags: POLITICS ELECTIONS)