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: Tim was working on his car. Sentence 2: He was putting in a screw in a tight engine area. Sentence 3: Tim accidentally dropped it. Sentence 4: He spent a long time using magnets to find it. Sentence 5: Unfortunately it was never seen again. Choices: a. Braces. b. Dropped Screw.

b