1.  Which of the following means Q is the grandfather of P?

A. P + N * M * Q
B. Q * N * M + P
C. Q ? M ? N * P
D. None of these

Answer: Option D

Explanation:

Option D is correct!

Because:

1. In option A:- P is great grandmother of Q (P is mother of N is father of M is father Q, 3 generations).

2. In option B:- Q is great grandfather P (Q is the father of N is the father of M is mother of P, 3 generations).

3. In option C:- Q is the uncle of P (Q is the brother of M is brother of N is father of P).

So the last option "None of these" is correct.