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.

Ex Input:
Sentence: Bob ran his hand over his girlfriends legs. One leg was shaved and the other was stubbly. He noted that the shaved leg was much smoother. Question: Which leg caused more friction? (A) The shaved leg (B) The stubbly leg

Ex Output:
A


Ex Input:
Sentence: A piece of toast heats up less when slid across a counter then when slid across a cutting board. Question: Which is the rougher surface? (A) cutting board (B) counter

Ex Output:
B


Ex Input:
Sentence: John rolled a large ball and a small ball at the same time. Question: Which will roll further faster? (A) large ball (B) small ball

Ex Output:

B