In a family of four members A, B, C, and D, A is a doctor, B is a teacher, and C is neither a doctor nor a teacher. If D is the father of A, who is the mother?
A family consists of a father, a mother, and two children. The father is a banker, the mother is a nurse, and one child is a student. If the other child is not a student, what is the profession of the second child?
In a family, there are four members: P, Q, R, and S. P is the son of Q, and R is the daughter of Q. If S is the brother of P, what is the relationship of S to R?