Question: who is the chairman of central board of film certification
Answer: Prasoon Joshi currently presides the board , being appointed as the 28th Chairperson of the Board on 11 August 2017 , after the ouster of Pahlaj Nihalani , who was preceded by Leela Samson who had resigned after the CBFC 's rejection of a certificate for the film MSG : Messenger of God was overturned by an appellate tribunal .