B is the husband of P. Q is the only grandson of E, who is wife of D and mother-in-law of P. How is B related to D ?
E is mother-in-law of P, who is wife of B,
=> B is son of E, who is wife of D.
Q is the only grandson of E, => Q is son of B and P.
B is son of D.
=> Ans - (C)
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