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 segway can travel a much greater distance inside a shopping mall before needing a recharge then when it is cruising around outside on the street. Question: Which surface is rougher? (A) shopping mall (B) street

Ex Output:
A

Ex Input:
Sentence: Tom accidentally knocks a clay pot and a metal pot off of a shelf. Question: Which pot is less likely to break? (A) Clay pot (B) Metal pot

Ex Output:
A

Ex Input:
Sentence: A tank driving over a battlefield experiences greater resistance then one rolling around in a hanger. Question: Which surface offers a less bumpy ride for the tank? (A) battlefield (B) hanger

Ex Output:
A