If A + B means A is the brother of B; A - B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?	Choose the correct answer
A) M - N x C + F  B) F - C + N x M  C) N + M - F x C  D) M x N - C + F  E) none
M is the father of N and N is the sister of C.C is brother of F..   so,N and c and F are siblings.   ANSWER:M x N - C + F
<result>D</result>
If A + B means A is the brother of B; A - B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?