Step 1: Breaking down the statement. "My father's wife" refers to Rohit's mother (assuming no stepmother is implied). "The daughter of my father’s wife" is Rohit’s sister. "The two brothers of the daughter" refers to the two brothers of Rohit's sister, which includes Rohit himself and his brother. The younger of the two brothers is Rohit's brother. Step 2: Conclusion. The person being referred to is Rohit's brother, which means the relation is that the person is Rohit's nephew.
Thus, the correct answer is option (A) Nephew.