Which of the following two sentences does not make sense?
Options:
- Sentence A: "he was living in his pen"
- Sentence B: "he was living in his house"

Hmmm, let me think. I want to lay out the solution in details.

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
A pen is not big enough to live in. The answer is Sentence A.