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: pomspitz. Sentence 1: I have a Pomeranian Japanese Spitz dog. Sentence 2: When i brought her she is actually not my first choice. Sentence 3: My first choice is the chihuahua but it's not cute when still a pup. Sentence 4: So i decided to buy the pomspitz. Choices: a. Lance pushed on without his shoe to try and beat his time. b. I never had regret choosing my dog because she is so playful.

a