The correct answer is: Cousin.
Vinod’s father’s wife is Vinod’s mother. The only brother of Vinod’s mother is Vinod’s uncle. The son of Vinod’s uncle is Vinod’s cousin.
Option A: Cousin. Vinod’s father’s wife is Vinod’s mother. The only brother of Vinod’s mother is Vinod’s uncle. The son of Vinod’s uncle is Vinod’s cousin.
Option B: Brother. Vinod’s father’s wife is Vinod’s mother. The only brother of Vinod’s mother is Vinod’s uncle. Vinod and Vishal are not brothers.
Option C: Son. Vinod’s father’s wife is Vinod’s mother. The only brother of Vinod’s mother is Vinod’s uncle. Vinod is not Vishal’s son.
Option D: Uncle. Vinod’s father’s wife is Vinod’s mother. The only brother of Vinod’s mother is Vinod’s uncle. Vishal is not Vinod’s uncle.