Amitabh questions Preity on KBC for not responding to his b'day wishes

Preity Zinta appeared on 'Kaun Banega Crorepati' with Sunny Deol to promote their film 'Batwara 1947'. During the show, Amitabh Bachchan questioned Zinta for not responding to his birthday wishes. "I wish you on your birthday...every year, and you didn't even respond to me once," he said, to which Preity responded, "I always respond to you…but after a week."