Black lungs' disease caused due to

Options

A. Coal dust
B. Iron dust
C. Cement dust
D. Silica dust

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the cause of "black lung disease." It's important to identify what this disease is and what factors contribute to its development.

2. **Identifying the Disease**: Black lung disease is also known as coal worker's pneumoconiosis. It is a type of lung disease that is caused by the inhalation of coal dust.

3. **Analyzing the Options**:
- **Option 1: Coal Dust**: This is the primary cause of black lung disease. Continuous exposure to coal dust leads to the accumulation of dust in the lungs, resulting in scarring and impaired lung function.
- **Option 2: Iron Dust**: This is incorrect. While iron dust can cause other respiratory issues, it is not the cause of black lung disease.
- **Option 3: Cement Dust**: This is also incorrect. Cement dust can lead to other lung problems but is not associated with black lung disease.
- **Option 4: Silica Dust**: This is incorrect as well. Silica dust exposure leads to silicosis, which is a different respiratory condition.

4. **Conclusion**: Based on the analysis, the correct answer is **Option 1: Coal Dust**. Continuous exposure to coal dust is the primary cause of black lung disease.