Select the correct statements about particulate matter

Options

A. `10 mum` size creates severe lung damage
B. more than 2.5 `mu` m gets trapped in lungs and causes problems
C. Less than `2. 5 mu m` penetrates deep into lungs
D. None of the above

Answer

To solve the question about particulate matter, we will analyze each statement provided and determine which ones are correct based on the information given in the video transcript.

### Step-by-Step Solution:

1. **Understanding Particulate Matter**:
- Particulate matter (PM) refers to microscopic solid or liquid particles suspended in the atmosphere. They can originate from natural sources (like dust and pollen) or anthropogenic sources (like vehicle emissions and industrial processes).

2. **Analyzing the Statements**:
- **Statement 1**: "10 micrometer size creates severe lung damage."
- This statement is incorrect. While larger particles can cause health issues, they do not penetrate deep into the lungs and are typically filtered out by the upper respiratory system.

- **Statement 2**: "More than 2.5 micrometer gets trapped in lungs and cause problems."
- This statement is partially correct. Particles larger than 2.5 micrometers can get trapped in the respiratory system, but they do not penetrate deeply into the lungs. They can cause respiratory problems but are not as severe as smaller particles.

- **Statement 3**: "Less than 2.5 micrometer penetrates deep into the lungs."
- This statement is correct. Particulate matter that is less than 2.5 micrometers in size is respirable and can penetrate deep into the lungs, leading to significant health issues.

3. **Conclusion**:
- Based on the analysis, the only correct statement regarding particulate matter is that particles less than 2.5 micrometers can penetrate deep into the lungs.

### Final Answer:
The correct statement about particulate matter is: **"Less than 2.5 micrometer penetrates deep into the lungs."**