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).

Q: Sentence: Clark just brought an icicle in from outside and is trying to melt it by rubbing it against two different places in his house. The first place is his granite counter-top, which has no bumps or cracks in it. The second place is against the rough carpet in his living room. Question: Which surface will melt the ice faster? (A) counter-top (B) carpet

A: counter-top
****
Q: Sentence: An airplane weighs much less then a submarine. Question: If both vehicles are accelerating, which will get up to top speed faster? (A) submarine (B) airplane

A: submarine
****
Q: Sentence: Mary and Billy are at the beach skipping rocks.  Billy works out everyday, but Mary is weaker. Question: Who can throw the rocks farther? (A) Mary (B) Billy

A:
Mary
****