If A+B equals to A who is the brother of B; A-B equals to A who is the sister of B and AxB equals to A who is the father of B.

Which of the following optoin means that C is the son of M?

A. M x N – C + F

B. F – C + N x M

C. N + M – F x C

D. M – N x C + F

C is the son of M Because

As M x N → M is father of N. So, N – C → N is sister of C.
And C + F → C is  brother of F. Hence, M is the father of C or C is the son of M.