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In coded relation type questions, the relationships are represented by certain codes or symbols such as + , - , ÷ , × , * etc. Then relationships between certain persons, given in the form of these codes, are to be analysed.

A + B means A is the daughter of B ;
A x B means A is the son of B  and
A - B means A is the wife of B.

If T - S x B - M, which of the following is not true ?

Option:
A. B is the mother of S.
B. M is husband of B.
C. T is wife of S.
D. S is daughter of B.
E. S is son of B.
Answer: D . S is daughter of B.

Justification:

T - S x B - M means T is the wife of S who is the son of B who is the wife of M   i.e. T is the wife of the son of M (father)  i.e. T is the daughter-in-law of M.
But as this is not given in the choice, so the fact in (d) derived  from S x B is true.

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