In a family, there are three siblings: X, Y, and Z. X is older than Y but younger than Z. If Y is 10 years old, how old is Z at least?

C. 12

A, B, C, D, and E are five students. A is older than B but younger than C. D is older than E but younger than A. Who is the youngest among them?

D. E

A family consists of a father, a mother, and two children. The father is a lawyer, and the mother is a teacher. If one child wants to be a doctor and the other a musician, which profession is not represented in the parents' professions?

C. DOCTOR

Five animals are arranged based on their sizes: Lion, Tiger, Elephant, Cat, and Mouse. The Lion is larger than the Tiger but smaller than the Elephant. The Cat is larger than the Mouse but smaller than the Tiger. Which animal is the smallest?

D. MOUSE

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