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: A post office counter is less bumpy then a coffee table. Question: Which surface will force a letter to move at a lower rate of speed when slid across it? (A) post office counter (B) coffee table
Example Output: post office counter

Example Input: Sentence: A bucket sliding across wet sand stays cooler then one sliding across dry sand. Question: Which surface is providing less resistance to the bucket? (A) wet sand (B) dry sand
Example Output: dry sand

Example Input: Sentence: Doug travels from his house to a friend's house on his bicycle, and he moves much more quickly than when he makes the same trip on foot. Question: In which situation will Doug get to his friend's house sooner? (A) On foot (B) On a bicycle
Example Output:
On foot