Definition: 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.
Input: Sentence: Our earth is one of the largest objects in space, but nothing compared to the sun. Question: Which object has stronger gravity? (A) Earth (B) Sun
Output:
Sun