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: Mary's kitchen floor is slicker then her hallway floor. She was feeding her dogs one day and some kibble slid across both surfaces. Question: Which surface caused the kibble to heat up less? (A) kitchen floor (B) hallway floor
Example Output: B

Example Input: Sentence: A tree trunk is thicker then a tree leaf. Question: Which part of the tree is the stronger one? (A) leaf (B) trunk
Example Output: A

Example Input: Sentence: A potato rolling on a cutting board experiences low resistance, while one rolling around on a wood floor experiences high resistance. Question: Which surface allows the potato to roll a greater distance? (A) cutting board (B) wood floor
Example Output:
B