M has a son Q and a daughter R. He has no other children. E is the mother of P and daughter-in-law of M. How is P related to M? A. P is the son-in-law of M. B. P is the grandchild of M. C. P is the daughter-in-law of M. D. P is the grandfather of M.

GATE 2016 · General Aptitude · Family Relationship · medium

Answer: P is the grandchild of M. Answer: B.

1. Identify E's position in the family: E is M's daughter-in-law means E is the wife of M's son. M's only son is Q. So E is married to Q.
2. Trace P's relationship to M: E (wife of Q) is the mother of P. Therefore P is the child of Q. Q is M's son. So P is M's grandchild.