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: A black hole is smaller in size than the sun. Question: Which will have the strongest gravity? (A) Sun (B) Black hole
Student:
Black hole