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?
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?
In a family, there are two brothers, A and B, and their sister C. A is a chef, B is an engineer, and C is a student. If A and C wear blue on weekends while B wears green, what color does C wear on weekends?
In a family of six members A, B, C, D, E, and F, A is the father of B. C is the mother of B and D. E is the sister of B. F is the brother of D. How is E related to F?