INBDE (Integrated National Board Dental Examination) Practice Exam 2026 - Free Practice Questions and Study Guide

An atlas refers to a collection of maps or charts, typically categorized by location or theme. Option B, C, and D do not accurately define what an atlas is, as they refer to specific parts of the spine or a specific type of coin. While these options may be valid definitions for "atlas" in certain contexts, they are not the most commonly accepted meaning of the term. Option A, on the other hand, correctly identifies an atlas as a type of book or reference material.