Question

why was Patol Babu's request for a rehearsal turned down by Mr Mullick?

Answer 1

because patol babu wanted to do the act in only one chance

Answer 2

Mr Mullick was a very busy and preoccupied director. He had no patience to grant rehearsal for an insignificant role. Moreover, the scene had to be shot in sunlight and as the clouds were seen approaching, he had to take the shot quickly. So he declined Patol Babu’s request for a rehearsal.