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.

[EX Q]: Sentence: Polyethylene is more flexible then pvc. Question: Which plastic is the more breakable of the two? (A) polyethylene (B) pvc
[EX A]: pvc

[EX Q]: Sentence: Jim wants to cross a river and has a one inch thick wood plank and a four inch thick wood plank. Question: Which plank is more likely to break? (A) One inch thick wood plank (B) Four inch thick wood plank
[EX A]: One inch thick wood plank

[EX Q]: Sentence: A zebra is forced to run at a slow pace in a zoo, but can run at a fast pace in a field. Question: Which surface has less resistance? (A) field (B) zoo
[EX A]:
field