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: Consider Input: Sentence: When playing pinball on two different machines, joe noticed that the pinball moved quickly over the glass surface whereas it barely moved at all over the mud surface. Question: Which surface showed less resistance? (A) Glass (B) Mud

Output: Mud

Input: Consider Input: Sentence: A condor experiences low resistance when flying through clear sky then when flying through rainy sky. Question: Which sky is providing a bumpier ride to the condor? (A) clear sky (B) rainy sky

Output: clear sky

Input: Consider 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