Given the task definition and input, reply with output. You are given a sentence, a question and two answer options. Your task is to write down the index ('A' or 'B') of the **incorrect** option for the given question.

Sentence: Jimbo and Fred were working out together. Jimbo was running the treadmill, but Fred was sitting on a chair. Question: Which person sweated more? (A) Fred (B) Jimbo
A