Use reasoning to lead to the answer of the following question:
One of the following sentences is nonsensical. Which one is it?\nOptions:\n- Sentence A: "The boy suddenly stroked, his mom called the firefighters immediately"\n- Sentence B: "The boy suddenly stroked, his mom called the ambulance immediately"\n

Sentence A
Firefighters are not trained to adequately help a stroke victim.

.

Therefore, the answer is Sentence A