In which of the following infection occur in alveoli of the lungs?

Options

A. Rhinitis
B. Pneumonia
C. Common cold
D. Both (2) and (3)

Answer

To solve the question regarding which infections occur in the alveoli of the lungs, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Alveoli**:
- The primary function of alveoli in the lungs is to facilitate gas exchange, specifically the exchange of oxygen and carbon dioxide. They are also involved in the process of ventilation, which includes inhaling and exhaling air.

2. **Identify the Infections Listed**:
- The question provides several options for infections. We need to analyze each option to determine if it affects the alveoli of the lungs.

3. **Analyze Each Option**:
- **Option 1: Rhinitis**:
- Rhinitis is an inflammation of the nasal mucosa, causing symptoms like irritation and swelling in the nose. It primarily affects the nasal passages, not the alveoli of the lungs. Therefore, this option is incorrect.

- **Option 2: Pneumonia**:
- Pneumonia is an infection that specifically targets the lungs, including the alveoli. It leads to inflammation and can cause symptoms such as difficulty breathing and coughing. This option is correct as it directly affects the alveoli.

- **Option 3: Common Cold**:
- The common cold primarily affects the upper respiratory tract, including the nose and throat. While it can lead to complications that affect the lungs, it does not directly infect the alveoli. Thus, this option is also incorrect.

4. **Conclusion**:
- Based on the analysis, the only infection that occurs in the alveoli of the lungs is pneumonia. Therefore, the correct answer to the question is **Option 2: Pneumonia**.

### Final Answer:
- The infection that occurs in the alveoli of the lungs is **Pneumonia**.