If A + B means that A is the brother of B, A × B means that A is the sister of B, A – B means that A is the mother of B

If A + B means that A is the brother of B, A × B means that A is the sister of B, A – B means that A is the mother of B, A ÷ B means that A is the father of B then which of the following expression shows that T is the paternal grandmother of R?

A.            P + Q ÷ R × S + T

B.            P + S – Q × T ÷ R

C.            P × R ÷ Q + S – T

D.            T – P ÷ S + R × Q

Sol:

Family tree according to option D

Option D shows that T is the paternal grandmother of R.