Read the following information carefully and answer the questions given below it:
'A + B' means 'A is the father of B'; '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'.​​

If P ÷ R + Q, which of the following is true?

P ÷ R + Q

So, P is the sister of Q is correct option.

Thus, the correct answer is (d).