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: It's easy to stab a pin into a pin cushion, but it's hard to stab one into a pillow. Question: Which surface will make the pin get hotter when stabbing into it? (A) pin cushion (B) pillow
Example Output: A

Example Input: Sentence: Tom and Steve are riding their bikes to the beach.  Tom starts riding his bike earlier. Question: Who rode their bike further? (A) Tom (B) Steve
Example Output: B

Example Input: Sentence: Jane and Dirk are roommates living in the same house. Question: If they take the same bus at the same time in the same bus stop, who will travel a shorter distance if Jane gets out of the bus one stop before Dirk does? (A) Jane (B) Dirk.
Example Output:
B