**Category:** Inorganic Chemistry  
**Subtype:** Identification of Gases  
**Problem Description:** Identify the main component of air based on its properties (colorless, odorless) and its percentage volume in the atmosphere.  

**Options:**  
A. \(\mathrm{N}_{2}\) (Nitrogen)  
B. \(\mathrm{CO}_{2}\) (Carbon Dioxide)  
C. NO (Nitric Oxide)  
D. \(\mathrm{O}_{2}\) (Oxygen)