Bollywood actor Aamir Khan (C) holds up his ink-stained finger as he leaves after casting his vote at a polling centre during the sixth phase of India's general election in Mumbai on April 24. 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/Danish Siddiqu