If P is the daughter of Q and Q is the sister of R, what is P's relation to R?

A. NIECE

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

A. BROTHER

If G is the uncle of H, and H is the daughter of J, what is the relationship of J to G?

C. BROTHER-IN-LAW

If N is the sister of O, and O is the father of P, what is the relationship of P to N?

D. NEPHEW

If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + C - B × D?

A. C IS THE SISTER OF D