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: Gary freaks out. Sentence 1: Gary is out trick or treating with his friends. Sentence 2: Gary arrives at this one spooky house with skeletons. Sentence 3: Gary is scared of the skeletons but he notices something else. Sentence 4: He see's a ghost walk cross the yard. Choices: a. She had left the stove on and caught the house on fire. b. Gary freaks out and runs home.
A:
a