IBPS RRB Officer Prelims 14 Nov 2016 Shift 1 Paper

S is the husband of D.
D is the sister of A.
D is the daughter of B.
Q is the daughter of B.
R is the husband of Q.
N is the daughter of Q and R.
(3) S is the husband of D.
D is the sister of Q.
Therefore, S is the brother–in–law of Q.