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: Fred was playing outside with friends. Sentence 2: All the sudden a latex ball came near him. Sentence 3: Fred could not breathe. Sentence 4: The ambulance had to come near him. Sentence 5: It was very serious. Choices: a. Allergic to latex. b. New kid on the block.
a