Q: You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.
Sentence: A jackfruit experiences low friction on a red surface and high friction on a purple surface. Question: Which surface is smoother? (A) red surface (B) purple surface
A:
red surface