You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the **incorrect** answer (return the string of the incorrect option, not A/B).

Example Input: Sentence: An envelope that is slid across a dresser gets rather hot, while one that is slid across a desk doesn't get very hot at all. Question: Which surface has more friction? (A) desk (B) dresser
Example Output: desk

Example Input: Sentence: Mary was bending objects to see which would break easier. She bent a plastic sheet and it didn't break, but she bent a glass sheet and it broke right away. Question: Which sheet was more flexible? (A) plastic sheet (B) glass sheet
Example Output: glass sheet

Example Input: Sentence: Pushing a safety pin into thin paper is easier then pushing it into thick paper. Question: Which paper will allow the safety pin to plunge into it at a faster rate of speed? (A) thick paper (B) thin paper
Example Output:
thick paper