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: The Saxophonist. Sentence 1: Bill was about to again step on stage at the underground club. Sentence 2: He always plays the saxophone here, but today is father is here. Sentence 3: Bill's father is a very talented but retired and judging saxophonist. Sentence 4: Bill nervously steps up and plays his first song. Choices: a. Johnny was glad he left the house. b. Bill's father nods his approval and Bill plays many more songs.
a