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.
Q: Title: Chemistry Calamity. Sentence 1: TJ was very excited when his parents gave him a chemistry set. Sentence 2: He loved to experiment with different mixtures and combinations. Sentence 3: His parents cautioned him to only use it when they were home with him. Sentence 4: But one night, TJ couldn't resist using it when his parents were out. Choices: a. A small explosion broke some windows and TJ knew he was in trouble. b. She knew she hadn't made the team.
A:
b