If A + B means A is the brother of B; A % B means A is the father of B and A x B means A is the sister of B. Which of the following means M is the uncle of P?

The correct answer is C.

A + B means A is the brother of B; A % B means A is the father of B and A x B means A is the sister of B.

In option C, M + S % R % P means M is the brother of S, who is the father of R, who is the uncle of P.

In option A, M % N x P means M is the father of N, who is the sister of P. This is not possible, as M cannot be both the father and sister of P.

In option B, N x P % M means N is the father of P, who is the uncle of M. This is also not possible, as M cannot be both the uncle and father of P.

In option D, M + K % T x P means M is the brother of K, who is the father of T, who is the sister of P. This is not possible, as M cannot be both the brother and sister of P.