Which of the following sentences is nonsensical?
Options:
- Sentence A: "A doctor uses a stethoscope to listen to a patient's heart."
- Sentence B: "A doctor uses a muffin to listen to a patient's heart."

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
You cannot use a muffin to listen to a heart. The answer is Sentence B.