Definition: 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).

Positive Example 1 -
Input: Sentence: Jacob and Benny are squatting at the gym. Jacob has thin frail legs and Benny has big strong legs. Question: Who squats less weight? (A) Jacob (B) Benny
Output: Benny

Positive Example 2 -
Input: Sentence: The fastest land animal on earth, a cheetah was having a 100m race against a rabbit. Question: Which one won the race? (A) the cheetah (B) the rabbit
Output: the rabbit

Negative Example 1 -
Input: Sentence: Suppose your neighbor John is playing music and your friend Nikos at the end of the street is also playing music. Question: Who's music will appear to be louder? (A) John (B) Nikos
Output: John

Negative Example 2 -
Input: Sentence: The Sun is closer to the Earth then the nearest star. Question: Which object looks bigger to someone standing on the Earth looking up? (A) Sun (B) Star
Output: Sun

Now complete the following example -
Input: Sentence: A dirty tooth isn't as smooth as a clean tooth. Question: Which surface will a toothbrush move over at a greater rate of speed? (A) dirty tooth (B) clean tooth
Output: 


Output: dirty tooth