You will be given a definition of a task first, then some input of the task.
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: Sick on a Plane. Sentence 1: Miriam was on a long flight home after vacation. Sentence 2: Midway through the flight she began to feel ill. Sentence 3: Before long she was being sick in the bathroom. Sentence 4: Her sickness persisted all the way home. Choices: a. It was the worst flight of her entire life. b. Wendy concluded that it must have been a ghost.
Output:
b