Big B set to start rehearsals for KBC 4 NDTV.com Bollywood megastar Amitabh Bachchan says he will start rehearsing for Kaun Banega Crorepati 4 from Friday. "Tomorrow (Friday) I start rehearsals for KBC... just getting the hang of things to come, the innovations and the formats. ... Innovative changes in KBC 4 Sony banega Crorepati Amitabh doesn't want to make mistakes |