What was KBC 10's â¹7-crore winning question that wasn't answered?
Binita Jain, the first to win â¹1 crore on 'Kaun Banega Crorepati' season 10, was asked, "Who invented the first stock ticker in 1867?" as the final question to win â¹7 crore. She decided to quit the game as she didn't know the answer. When Amitabh Bachchan asked her to guess, she picked the correct option, which was Edward Calahan.