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

In a coded relation, if A ÷ B means A is the father of B, B - C means B is the sister of C, and C + D means C is the brother of D, what is the relationship of A to D in A ÷ B - C + D?

B. A IS D'S FATHER

If A + B means A is the mother of B, and B - C means B is the sister of C, what is the relationship of A to C?

B. AUNT

If X × Y means X is the brother of Y, and Y ÷ Z means Y is the daughter of Z, what is the relationship of X to Z?

D. GRANDSON

If J * K means J is the husband of K, and K - L means K is the sister of L, what is the relationship of J to L?

A. BROTHER-IN-LAW