Given the task definition and input, reply with output. In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.

Sentence 1: Tom stopped using deodorant. Sentence 2: I could smell his armpits. Sentence 3: I went to the store and bought Tom some new deodorant. Sentence 4: He refused to use it. Sentence 5: His new girlfriend likes the smell of his arm pits. Choices: a. Full. b. Stinky Armpits.
b