A $ B means A is the father of B; A # B means A is the sister of B; A * B means A is the daughter of B and A @ B means A is the brother of B. Which of the following indicates that M is the wife of Q?

The correct answer is D.

In the given question, $ means father, # means sister, * means daughter, and @ means brother.

In option A, Q is the father of R, who is the sister of T, who is the brother of M. This is not possible, as a person cannot be the father, sister, and brother of the same person.

In option B, Q is the father of R, who is the brother of T, who is the sister of M. This is also not possible, as a person cannot be the father and brother of the same person.

In option C, Q is the father of R, who is the daughter of T, who is the sister of M. This is not possible, as a person cannot be the father and daughter of the same person.

In option D, Q is the father of R, who is the husband of T, who is the wife of M. This is possible, as a person can be the father and husband of the same person. Therefore, the correct answer is D.