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: The mass of Mars is less than the mass of Neptune. Question: If a brick is dropped from 1 mile up on each planet, where will it fall the fastest? (A) Mars (B) Neptune
Example Output: A

Example Input: Sentence: A computer mouse moves with ease on a smooth plastic mouse pad, whereas, on the flat wooden desk at times it sticks and does not work. Question: Which surface has more friction? (A) wooden desk (B) plastic mouse pad
Example Output: B

Example Input: Sentence: Suppose Flash who is the fastest superhero on the planet races Ironman in a 1 min all out sprint. Question: Who would win this race? (A) Ironman (B) Flash
Example Output:
A