Definition: 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: Science fair. Sentence 1: Tom didn't have any experiment to show for the science fair at school. Sentence 2: He went to his father to ask for some help. Sentence 3: As his father was a chemist he fashioned something complicated. Sentence 4: Tom went to school and fascinated everyone with his invention. Choices: a. But he didn't understand any of it himself. b. To her shock, it was the baby who was early but healthy.
Output:
b