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

A. SISTER

If D is the son of E and E is the daughter of F, what is D to F?

A. GRANDSON

If G is the daughter of H and H is the sister of I, what is G to I?

A. NIECE

If D is the daughter of E and E is the mother of F, what is the relationship of F to D?

B. BROTHER

If A is the brother of B, and B is the sister of C, what is the relationship of C to A?

B. BROTHER