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 sitting at one of the ends. What is the correct order from left to right?
Answer: B. D, C, A, B
D must be at one end, and since A is to the left of B and to the right of C, the only valid order is D, C, A, B.