Given the task definition and input, reply with output. 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.

Title: anne's headache. Sentence 1: Anne woke up with a terrible headache. Sentence 2: She had been up late the night before studying for a big test. Sentence 3: Anne looked in her bathroom for some pain killers. Sentence 4: When she couldn't find any, she asked her roommate for medicine. Choices: a. He was finally able to quit. b. Anne's roommate gave her two tylenols to help with her headache.
a