OK. You'll be given the following question. Please do chain-of-thought reasoning.
Which of these sentences doesn't make sense?
Options:
- Sentence A: "He was fishing in the lake"
- Sentence B: "He was fishing in the ladder"

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
You can only go fishing in a body of water.
Thus, the answer is Sentence B.