In a family, there are four members: P, Q, R, and S. P is the grandmother of R, Q is the mother of R, and S is the father of Q. What is the relationship of S to R?

A. GRANDFATHER

In a family, the father is a banker, the mother is a nurse, and they have two children. If the son wants to become a banker like his father and the daughter wants to be a nurse like her mother, which profession is not chosen by either child?

C. TEACHER

In a family, A is the mother of B and C. B is the father of D. If A is 50 years old and B is 30 years old, how old is C at least?

A. 20

In a family of five members A, B, C, D, and E, A is a doctor, B is a teacher, C is a lawyer, D is the mother, and E is the father. Who among them is the teacher?

B. B

In a family, there are three children: X, Y, and Z. X is the oldest and is a painter. Y is younger than X but older than Z, who is a musician. What is Y's profession?

C. UNKNOWN