'A + B' means 'A is the sister of B' , 'A - B' means 'A is the father of B'. '$$A \times B$$' means 'A is the brother of B'.

If $$Q + R - P \times N - S$$​ , then how is R related to S ?​​

Given: Q + R - P × N - S

So, Grandfather is R related to S.

Thus, the correct answer is (d).