General Intelligence · Blood Relations

Directions: Read the following information carefully to answer the question: There are 7 family members: P, Q, R, S, T, U and V going to a party. There are three generations in which only two are married couples. P is the grandfather of U who is a male. R is the son-in-law of S. V is the son of Q. S has only two children, both of the same gender. T is the sister-in-law of R. How many males are there in the family?