In a family of four members A, B, C, and D, A is a doctor, B is a teacher, C is A's sibling, and D is the mother of A and C. What is the profession of C?

C. UNKNOWN

In a family, there are three siblings: X, Y, and Z. X is older than Y but younger than Z. If Z is a lawyer, what can be inferred about Y's profession?

C. UNKNOWN

Four friends, A, B, C, and D, attended a seminar on different days. A attended on Monday, B attended on Wednesday, and C attended the day before D. What day did D attend?

B. THURSDAY

In a family, P is the father of Q, and Q is the mother of R. If R is a student, what is P's relationship to R?

A. GRANDFATHER

In a row of chairs, A is sitting to the left of B and to the right of C. D is sitting to the right of A. Who is sitting in the middle?

A. A