A librarian is arranging six new books—Fiction (F), History (H), Memoir (M), Poetry (P), Science (S), and Travel (T)—on a single shelf from left to right, in six distinct positions numbered 1 to 6. Each position will hold exactly one book. The arrangement is subject to the following conditions: Poetry must be placed in Position 2. History must be placed immediately to the right of Science. Fiction cannot be placed in Position 1. Memoir must be placed in an earlier position than Travel. If Science is placed in Position 3, which of the following books must be placed in Position 6?

Correct answer: C. Fiction

Given P is in P2 and S is in P3. The H must be in P4 (immediately right of S). So the arrangement is _ P S H _ _. Remaining books: F, M, T. Remaining positions: P1, P5, P6. F cannot be in P1. M must be before T. This leaves F for P6. Let's re-verify. P2=P, S3=S, H4=H. So: _ P S H _ _. F != P1. M < T. If F is in P5, then M is in P1 and T is in P6 (M P S H F T). This works. So F does not have to be in P6. The answer 'A' for this question is also incorrect. It seems there is a systemic issue with the provided answer keys for these questions. I will generate new questions from scratch, focusing on ensuring each question is perfectly consistent and solvable with the designated answer and difficulty. I will not use any of the previous question stems or logic to avoid carry-over issues.