Which of the following is an air-borne disease ?

Options

A. Measles
B. Typhoid
C. Pink eye
D. None of these

Explanation

To determine which of the following is an air-borne disease, we need to understand what an air-borne disease is. An air-borne disease is one that spreads through the air, typically via respiratory droplets released when an infected person coughs, sneezes, or talks. These pathogens can then be inhaled by a healthy person, leading to infection.

### Step-by-Step Solution:

1. **Identify the Definition**: Understand that air-borne diseases are transmitted through the air from an infected person to a healthy person.

2. **Review the Options**: Look at the diseases listed in the options provided. Common examples of air-borne diseases include measles, tuberculosis, and influenza.

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