H is the son of I. J is the sister of I. How is H related to J?

A. NEPHEW

In a coded relation, if P - Q means P is the mother of Q, and Q + R means Q is the sister of R, what is the relationship of P to R in P - Q + R?

B. P IS R'S MOTHER

If M is the sister of N and N is the father of O, what is the relationship between M and O?

A. AUNT

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?

A. C IS THE SISTER OF B

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

D. SISTER