Introducing a man to her husband, a woman said, "His brother's father is the only son of my grandfather." How is the woman related to the man ?

Options

A. Mother
B. Aunt
C. Sister
D. can't be dertermined

Answer

D

Explanation

My grandfather.s Only son-father, or uncle. If man is the son of father, the woman becomes sister. But if he is uncle, she becomes cousin.