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?
In a family of six members A, B, C, D, E, and F, there are two married couples. A is a doctor, B is a teacher, C is the wife of A, D is the son of A, E is the daughter of B. What is the profession of F?