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

A. NIECE

If A is the sister of B and B is the mother of C, what is A's relation to C?

A. AUNT

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

A. SISTER

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 + B × C?

D. C IS A'S SON

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

A. NIECE