If X is the father of Y and Y is the son of Z, what is Z's relation to X?

C. WIFE

If G is the uncle of H and H is the son of I, what is the relationship between G and I?

A. BROTHER AND SISTER

If X is the daughter of Y and Y is the sister of Z, what is the relationship of X to Z?

A. NIECE

If X - Y means X is the sister of Y, Y + Z means Y is the brother of Z, and Z × X means Z is the father of X, what is the relationship of Y to X?

A. Y IS X'S BROTHER

If P - Q means P is the sister of Q, Q + R means Q is the mother of R, and R * S means R is the son of S, what is the relationship of P to S?

B. AUNT