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).

[EX Q]: Sentence: A comet has been flung to the center of the solar system between the Sun and Mercury. The Sun is magnitudes larger in terms of mass than is Mercury. Question: Which body has the higher amount of gravitational pull and will pull the comet into its orbit? (A) The Sun (B) Mercury
[EX A]: Mercury

[EX Q]: Sentence: Driving a car to work takes less time then riding a bus. Question: Which vehicle moves at a greater rate of speed? (A) bus (B) car
[EX A]: bus

[EX Q]: Sentence: Jane tested a tennis ball on two different surfaces, observing the different results. First, she skidded a tennis ball across a slick hard court, and then across a shaggy grass court. Question: Skidding produces more heat on which surface? (A) hard court (B) grass court
[EX A]:
hard court