Let's think step by step! Of the below sentences, which one does *not* make sense?
Options:
- Sentence A: "Pillow stuffed with cotton"
- Sentence B: "Pillow stuffed with iron"

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Iron doesn't make for a very soft pillow. The answer: Sentence B.