A is brother of B and M; G is mother of B; F is father of A. Which of the following statements is not correct ?

The correct answer is (b).

A is brother of B and M. This means that A, B, and M are siblings. G is mother of B. This means that B is G’s son. F is father of A. This means that A is F’s son.

(a) B is brother of M. This is correct because A is brother of B and M, and B is also brother of M.

(c) G is wife of F. This is correct because G is mother of B, and B is son of F.

(d) A is Father of M. This is incorrect because A is brother of M, and M is not A’s son.