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: 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

Ex Output:
A


Ex Input:
Sentence: A baby experiences less friction crawling in his playpen then crawling in the living room. Question: Which surface will force the baby to crawl at a lower rate of speed? (A) playpen (B) living room

Ex Output:
A


Ex Input:
Sentence: Minnie can choose between two trains for her travel. The red train and the blue train both go the same speed, but the red train travels for less time than the blue train. Question: Which train travels less distance? (A) red train (B) blue train

Ex Output:

B