Definition: 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'.
Input: Sentence 1: Billy fell down from a ladder in his home. Sentence 2: His arm hurt badly and looked funny. Sentence 3: Billy's wife drove him to the ER. Sentence 4: Billy needed to have X-rays done. Sentence 5: The doctor confirmed that his arm was broken. Choices: a. Broken Arm. b. The Security.

a