If Z is wife of Q, then how is Q related to O?

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Question

Answer the questions based on the information given below. There are nine members (K, L, M, N, O, P, Q, R and S) in a family, which consist of three generation and four married couples. O is son of N. K is married to M. R is married to grandson of K, who is grandfather of P. S have 2 sons and one of them is P. N is son-in-law of Q. L is sister-in-law of O.