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: A traveler wants to go between cities in Japan. She does some research and sees that a bullet train can go much faster than a car. Question: If she wants to spend less time in her trip from city to city, which should she choose? (A) bullet train (B) car.
Example Output: B

Example Input: Sentence: John and Flora each head down the beach. John is walking while Flora is running. Question: Who makes it less far down the beach? (A) Flora (B) John
Example Output: A

Example Input: Sentence: Mary and Tim were going on a trip.  They were both driving their cars.  Both were driving at the same speed and left at the same time.  However, Mary stopped at four in the afternoon, while Tim drove until it was dark. Question: Who drove farther? (A) Mary (B) Tim
Example Output:
A