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: A sports car weighs less then a truck. Question: Which vehicle can accelerate at a greater rate of speed? (A) sports car (B) truck

Ex Output:
B

Ex Input:
Sentence: Bernie is pitching marbles. He notices that when he pitches the marbles on the tile in his kitchen, the marble goes faster and farther away than when he does the same action on grass. Question: Which surface is applying less friction to the marble? (A) grass (B) tile?

Ex Output:
A

Ex Input:
Sentence: Our earth is one of the largest objects in space, but nothing compared to the sun. Question: Which object has stronger gravity? (A) Earth (B) Sun

Ex Output:
A