Q:

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?

• 1
  M - N x C + F
• 2
  F - C + N x M
• 3
  N + M - F x C
• 4
  M x N - C + F