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?
Answer: D
M x N → M is the father of N
N - C → N is the sister of C
and C + F → C is the brother of F.
Hence, M is the father of C or C is the son of M.