In a family of six members P, Q, R, S, T, and U, there are two males and four females. P is a teacher, Q is a doctor, R is T's mother, S is U's sister, and T is a student. Who is the male member of the family?
Answer: B. Q
Since R is T's mother and there are four females, P and Q must be the males. Given that P is a teacher and Q is a doctor, Q is the male member.