Question

A and B are brothers, C and D sisters. A's son is D's brother. Hoe is B related to C?

Answer 1

Since, B is the brother of A and A's son is the brother of d, so D is the daughter of A. Since, C and D are sister, so C is also the daughter of A. Thus , B is the uncle of C.

Answer 2

A and B are brothers . A ' son is D ' s brother So D is A's daughter as well as C is A's daughter. So B should be C's uncle as A and D are brothers .
Tq hope this helps you
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@spyder