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: Jane tested a tennis ball on two different surfaces, observing the different results. First, she skidded a tennis ball across a slick hard court, and then across a shaggy grass court. Question: Skidding produces more heat on which surface? (A) hard court (B) grass court
A:
A