A and D is the pair of couples in the family.
A is a doctor.
Gender of F and E is not clear, hence total number of male cannot be determined.
A is grandfather of E.
E is an engineer.
R + N ? Q × T is the required equation to answer the previous question.
Here the used symbols are '+', `?' and '×'.
Therefore, redundant part of the symbols given in the direction is statement (i).
On putting sign (?) in place of question mark (?)
From the below figure, it is clear that Q is the nephew of T.
Hence, none of true.
Q is husband of P.
XS and QP are the two married couples.
Gender of R is not clear. R may be sister or brother of T.
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