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 bowling ball has more mass then a baseball. Question: Which item has stronger gravity? (A) baseball (B) bowling ball
Example Output: A

Example Input: Sentence: Jack and Jill are sliding a cellphone back and forth along the tabletop very easily. Their mother puts a tablecloth over the tabletop and it's not as easy to slide the phone anymore. Question: Which surface has less friction? (A) TABLETOP (B) TABLECLOTH
Example Output: B

Example Input: Sentence: A racehorse and a horse drawn carriage both depart from a saloon at the same time.  The horse drawn carriage is twenty times slower than the racehorse. Question: Which will arrive last at the next town? (A) the horse drawn carriage will take more time to arrive at the next town (B) the racehorse will take more time to arrive at the next town
Example Output:
B