In a family of four members A, B, C, and D, A is a doctor, B is a teacher, C is A's sister, and D is B's brother. Who is the teacher's sibling?

C. D

In a group of students, X scored more than Y but less than Z. W scored less than X but more than Y. Who scored the least?

B. Y

In a race, five runners P, Q, R, S, and T finished in the following order: P finished before Q but after R. S finished before T but after Q. What is the correct finishing order?

A. R, P, Q, S, T

Among four athletes, Sam is faster than Tom but slower than Jake. Lucy is the fastest. Who is the slowest?

B. TOM

Five animals are arranged in a line: Lion, Tiger, Bear, Fox, and Wolf. The conditions are: The Lion is not next to the Bear. The Fox is between the Tiger and the Wolf. Which animal is at the end of the line?

D. WOLF