Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sentence: Neptune is one of the largest planets in the solar system. Question: Which object has stronger gravity? (A) Mercury (B) Neptune
Student:
Neptune