In a family of six members A, B, C, D, E, and F, there are two married couples. A is a teacher, B is a doctor, C is a lawyer, D is the wife of A, E is the husband of C, and F is a student. Who is the wife of B?

B. D

In a class of five students: P, Q, R, S, and T, P is taller than Q but shorter than R. S is shorter than T but taller than Q. Who is the tallest?

B. R

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?

A. A

Three friends X, Y, and Z have different pets: a dog, a cat, and a bird. X does not have a dog. Y has a bird. Who has the cat?

C. Z

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?

A. A