Megastar Amitabh Bachchan got emotional listening to the story of `Kaun Banega Crorepati 14` contestant Harsh Kumar Singh. He told the host that he took over the hotseat so that he could use the winning amount for the treatment of his wife. Saying that he could understand his condition as kidney transplant is not easy and needs a lot of expenditure, Big B extended his best wishes for winning the amount needed for the treatment of his wife.

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