Instructions: In this task, you're given the title of a five-sentence story, the first four sentences, and two options for the fifth sentence as a and b. Your job is to pick the sentence option that does not connect with the rest of the story, indicating your choice as 'a' or 'b'. If both sentences are plausible, pick the one that makes less sense.
Input: Title: Unprepared. Sentence 1: I had a final exam in my math class today. Sentence 2: But I didn't know how to answer many questions. Sentence 3: I resorted to guessing. Sentence 4: And now I will feel anxious until I get my test results back. Choices: a. Toby left and went back home, reveling in the swimming fun he had had. b. I learned that I should have prepared better.
Output:
a