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.

Example Input: Sentence: An envelope that is slid across a dresser gets rather hot, while one that is slid across a desk doesn't get very hot at all. Question: Which surface has more friction? (A) desk (B) dresser
Example Output: A

Example Input: Sentence: Tom rides his bicycle as fast as he can around a track for an hour and he rides his motorcycle as fast as he can around the same track for an hour. Question: On which vehicle will Tom complete fewer laps? (A) Bicycle (B) Motorcycle
Example Output: B

Example Input: Sentence: Jim is much stronger physically than his good friend Lou, but they enjoy a good natured competitive friendship nonetheless. Question: When Lou challenges Jim to a discus challenge, which of the two men will achieve a throw of greater distance? (A) Lou will achieve greater distance (B) Jim will achieve greater distance
Example Output:
A