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: A hair brush experiences low resistance when slid across a porcelain tile compared to when it is slid across a throw rug. Question: Which surface will allow the hair brush to slide a greater distance? (A) throw rug (B) porcelain tile
Example Output: A

Example Input: Sentence: A monkey in a tree reaches out and bends a small branch and it breaks. Then he grabs another branch and tries to break it but it just bends. Question: What is true? (A) the first branch was more flexible (B) the second branch was more flexible
Example Output: A

Example Input: Sentence: Debbie was exercising with a giant exercise ball. It rolled out from under her and rolled on the frictionless gym floor. She retrieved it and started again, but this time it rolled onto a rough rubber mat. Question: Which surface was smoother? (A) gym floor (B) rubber mat
Example Output:
B