Suresh introduces a man as “He is the son of the woman who is the mother of the husband of my mother”.
We draw the flow chart of given information as follows, circle around the alphabet indicates that that person is a lady.
If Suresh father is only son of his grand mother then Suresh is son of the man. If his father is not only son then Suresh is the nephew of that man. But nephew is not given in option so we consider as only son, then we can conclude that Suresh is son of that man . So bis the answer.