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: Jacob and Benny are squatting at the gym. Jacob has thin frail legs and Benny has big strong legs. Question: Who squats less weight? (A) Jacob (B) Benny
Example output: B
Example explanation: Typically, people with thin frail legs squat less weight than people with big strong legs, so the incorrect answer is Benny.
Q: Sentence: Ian rolls two balls down a sidewalk at the same time. One is red, the other is white. The white ball goes further than the red one. Question: Which ball went slower? (A) white ball (B) red ball
A:
A