If A + B means B is the brother of A; A x B means B is the husband of A; A – B means A is the mother of B and A % B means A is the father of B, which of the following relations shows that Q is the grandmother of T?

The correct answer is $\boxed{\text{A. Q – P + R % T}}$.

Here is a brief explanation of each option:

• Option $\text{A. Q – P + R % T}$: This option shows that Q is the mother of P, P is the husband of R, and R is the father of T. Therefore, Q is the grandmother of T.
• Option $\text{B. P x Q % R – T}$: This option shows that P is the husband of Q, Q is the father of R, and R is the brother of T. Therefore, Q is not the grandmother of T.
• Option $\text{C. P x Q % R + T}$: This option shows that P is the husband of Q, Q is the father of R, and R is the son of T. Therefore, Q is not the grandmother of T.
• Option $\text{D. P + Q % R – T}$: This option shows that P is the brother of Q, Q is the father of R, and R is the brother of T. Therefore, Q is not the grandmother of T.