If X is the daughter of Y, and Y is the sister of Z, what is X's relation to Z?

A. NIECE

If A + B means A is the brother of B, and B - C means B is the sister of C, what is the relationship between A and C?

C. COUSIN

A is the sister of B. C is the brother of A. How is C related to B?

A. BROTHER

G is the mother of H. I is the sister of G. How is I related to H?

A. AUNT

M is the son of N. O is the daughter of N. P is the brother of M. How is O related to P?

A. SISTER