A – B means, A is the wife of B.

A ÷ B means, A is the brother of B.

A + B means, A is the daughter of B.

A × B means, A is the son of B.

Which of the following symbol will come in place of question mark (?) to make the expression Q is daughter-in-law of T ?

P + Q – R ? S – T

×

↑ or ↓ ⇒ Upward or downward line shown "generation gap" .

   =    ⇒ Double lines shown "relation b/w Husband & Wife"

   —   ⇒ single line shown "relation in same generation other than Husband & Wife".

   +   ⇒ Plus sign shown " Male".

   -   ⇒ Plus sign shown " Female".

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ATQ,

Q becomes daughter in law of S only when R becomes son of S, therefore correct answer is option (A).