In a family of six members A, B, C, D, E, and F, there are two married couples. A is a teacher, B is a doctor, C is a lawyer, D is the wife of A, E is the husband of C, and F is a student. Who is the wife of B?
Answer: B. D
D is the wife of A, and since E is the husband of C, B must be married to D, making D the wife of B.