Answer-If N has a brother, then how is M related to brother of N?

Question

If N has a brother, then how is M related to brother of N?

Answer the questions based on the information given below. Eight persons L, M, N, O, P, Q, R and S are in the family of three generations. No single person in the family is a parent. There are only three married couples in the family. M is the only brother of Q. L is the brother-in-law of
M. R is the grandson of S, who is sister of P. M is the uncle of R. O is the father-in-law of N. Gender of P and N is different.

A Brother-in-law

B Father-in-law

C Father

D Uncle

E Cannot be determined