O is the grandfather of P. Q is the father of P. R is the sister of Q. How is R related to O?

A. AUNT

In a coded relation, if P ÷ Q means P is the father of Q, P - Q means P is the daughter of Q, and P + Q means P is the son of Q, what is the relationship of R if P ÷ Q + R?

C. R IS Q'S SON

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

B. HUSBAND AND WIFE

If A is the brother of B, and B is the sister of C, what is the relationship of C to A?

B. BROTHER

If X + Y means X is the uncle of Y, X - Y means X is the aunt of Y, and X × Y means X is the brother of Y, what is the relationship of Z if X + Z × Y?

A. Z IS THE COUSIN OF Y