B is the mother of M and A. Z, who is the husband of Y, is the son-in-law of O. Y is the sister of A. How is B related to O?
Given that B(Female) is the mother of M & A(Siblings).
Z(Male), who is the husband of Y(Female) is the son-in-law of O. Y is the sister of A. It says M,A & Y are siblings. If Z is son-in-law of O, Y is daughter of O. As M,A& Y are siblings and given that B is their mother, Relationship between B & O is wife & Husband. Therefore, B is wife of O.
Family Diagram :
So, the answer would be option c)Wife
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