Which of the following disease is caused due to `SO_2`?
I.Asthma
II. Bronchitis
III.Emphysema

Options

A. I and II
B. Only I
C. II and III
D. All of these

Answer

To determine which diseases are caused by sulfur dioxide (SO₂), we can analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Sulfur Dioxide (SO₂)**:
- Sulfur dioxide is a colorless gas with a pungent odor. It is primarily produced from industrial processes and the burning of fossil fuels. It is known to have harmful effects on human health, particularly affecting the respiratory system.

2. **Identifying the Diseases**:
- We need to assess each of the diseases listed in the question:
- **I. Asthma**: Asthma is a chronic respiratory condition characterized by difficulty in breathing due to inflammation and narrowing of the airways. Exposure to irritants like SO₂ can trigger asthma attacks.
- **II. Bronchitis**: Bronchitis is the inflammation of the bronchial tubes, which can be caused by inhaling irritants such as SO₂. It leads to coughing and difficulty in breathing.
- **III. Emphysema**: Emphysema is a progressive disease that causes damage to the air sacs in the lungs, leading to shortness of breath. While it is primarily associated with long-term exposure to harmful substances, SO₂ can exacerbate the condition.

3. **Conclusion**:
- All three diseases (asthma, bronchitis, and emphysema) can be affected by exposure to sulfur dioxide. Therefore, SO₂ can contribute to the development or worsening of these respiratory diseases.

4. **Final Answer**:
- Since all three diseases are associated with SO₂ exposure, the correct answer is **option four: all of these**.