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: Anna had a dentist appointment. Sentence 2: It was her first one, and she was afraid. Sentence 3: But the dentist was very kind to her. Sentence 4: He made Anna very relaxed. Sentence 5: She was never again scared to visit the dentist! Choices: a. Dentist. b. Chess.
a