1.  A and B are married couple. X and Y are brothers. X is the brother of A. How is Y related to B?

A. Cousin
B. Brother
C. Brother-in-law
D. None of these

Answer: Option C

Explanation:

A and B are husband and wife. Since X and Y are brothers and X is the brother of A, Y is also the brother of A. Thus, Y is the brother-in-law of B.