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?
Four friends - A, B, C, and D - are sitting in a row. A is to the left of B but to the right of C. D is not at either end. Who is sitting in the middle?