How is Q related to M?

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Question

Answer the questions based on the information given below. Seven persons L, M, N, O, P, Q and R are in a family of three generations. No single person in the family is a parent. P is the grandson of N, who is the mother of Q. Q is unmarried male. O is the sister-in-law of Q. L is the brother-in-law of M, who is the maternal aunt of R.