Instructions: 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).
Input: Sentence: Elias has just made two paper airplane. One is consistently faster in the air. Question: This is probably made of which? (A) Printer Paper (B) Poster Board
Output:
Poster Board