See question below:
One of the following sentences is nonsensical. Which one is it?
Options:
- Sentence A: "If your heartbeat stops then you are classed as dead."
- Sentence B: "You are still alive if you do not have a heartbeat."

Reason slowly and give your answer.
Your heartbeat is what keeps you alive and breathing by transporting blood so without it you are dead.
The final answer: Sentence B.