If A is the brother of B, and B is the sister of C, how is A related to C?

A. BROTHER

D is the mother of E and F. G is the father of E. How is G related to F?

B. FATHER

If D is the daughter of E and E is the sister of F, what is the relationship between D and F?

A. NIECE

X is the father of Y. Y is the sister of Z. W is the brother of X. How is W related to Z?

A. UNCLE

A is the daughter of B. C is the son of B. What is the relation of C to A?

A. BROTHER