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: Louis notices that when he pushes his book on the carpet, it doesn't go as far as when he pushes the book on the kitchen floor. Question: Which surface has greater resistance? (A) kitchen floor (B) carpet
Example Output: A

Example Input: Sentence: A crab can scurry a greater distance over a beach then over an ocean floor. Question: Which surface gives the crab more resistance? (A) ocean floor (B) beach
Example Output: B

Example Input: Sentence: Jim wears a thick Kevlar vest. Jack is just wearing a cotton shirt. Question: Which top would stop a bullet? (A) Kevlar (B) Cotton
Example Output:
B