How is P related to M?

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Question

Study the following information carefully and answer the questions below: There are nine members in a family i.e. P, Q, R, S, T, U, V, M and W. Among them only two married couples and only four males are there. R is married to P. Q is the only child of S. U is married and she has a mother in law. M has a child. S is paternal grandmother of T and T is uncle of W. P is father of T’s mother and V. M is not a female member of a family.