1.

Each of P, Q, R, S, W, X, Y and Z has been married at most once. X and Y are married and have two children P and Q. Z is the grandfather of the daughter S of P. Further, Z and W are married and are parents of R. Which one of the following must necessarily be FALSE?

A. X is the mother-in-law of R
B. P and R are not married to each other
C. P is a son of X and Y
D. Q cannot be married to R
Answer» C. P is a son of X and Y


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