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

B. R IS THE DAUGHTER OF P

If X - Y means X is the father of Y, Y + Z means Y is the brother of Z, and Z × W means Z is the sister of W, what is the relationship of W to X?

B. W IS THE DAUGHTER OF X

If M + N means M is the uncle of N, N - O means N is the sister of O, and O × P means O is the father of P, what is the relationship of P to M?

A. P IS THE NEPHEW OF M

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

B. D IS THE SISTER OF A

In a class of 30 students, John is ranked 12th from the top. What is his rank from the bottom?

B. 19TH