How did Sudha became friend with Amal?

Answer: In the play The Post Office by Rabindranath Tagore Amal was an orphan boy adopted by Madhav. We are told that Amal was suffering from an incurable disease and village doctor had told him not to be out of the room. So, he sat beside a window by the road and gossiped with passerby. Once he called a girl named Sudha. She was going to pick flowers for a mother who would make garland to sell. Then Amal became very delighted and wished to go with her. He told her that he would pick the best flower from the top of the tree for her. But Sudha did not able to stay there for long because then she would get no flowers. Amal requested her to give him a flower when she would return and he would pay for it when he would be a grown up. At last she agreed and promised him before leaving to give him a flower that she kept at the very end of the play.