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: One of Sarah's neighbors spilled dog food all over the stairs. The dog food pieces are on three stairways and all over the landings. Sarah gets mad and kicks a piece of dog food. The dog food flies across the wooden planks from one side of the staircase landing to the other. The dog food reaches the neighbor's door mat. It moves a few inches across the doormat. Question: Why didn't the dog food move further across the doormat? (A) The door mat is a spikier surface (B) the staircase landing is a spikier surface
Example Output: B

Example Input: Sentence: In an amateur drag race, Kevin reached the finish line before his competitor, Harold, was even halfway there. Question: Between the two of them, which racer's dragster had been souped up? (A) Harold had the souped up dragster (B) Kevin had the souped up dragster
Example Output: A

Example Input: Sentence: A steel sheet is less flexible then a rubber sheet. Question: If you bend both objects, which is most likely to break in half? (A) rubber sheet (B) steel sheet
Example Output:
A