Answer the questions based on the information given below. There are seven persons P, Q, R, S, A, B and C in a family of three generations. There are only two married couples in the family. A is the sister-in-law of S. P is the father of
C. C is the uncle of R. S is the paternal aunt of
B. Q is the son-in-law of A, who is not in the second generation. How many male members are there in the family?