Amitabh Bachchan has written an emotional letter to Babil Khan, the son of late actor Irrfan Khan. In a message to Babil, the Jhund actor said that the lovely link of friendship transcends death. Irrfan’s kid posted the message on his Instagram account with loving emoticons, addressing him as ‘My dear Babil.’ Babil’s ‘warm personal note’ prompted the 79-year-old megastar