Pneumonia that infects lung alveoli is caused by

Options

A. (a) Plasmodium
B. (b) Salmonella typhii
C. (c) Haemophilus influenzae
D. (d) None of the above

Answer

### Step-by-Step Solution:

1. **Understanding Pneumonia**:
- Pneumonia is a serious lung disorder characterized by inflammation of the alveoli (the tiny air sacs in the lungs). This inflammation can lead to the alveoli filling with fluid or pus, which impairs breathing and gas exchange.

2. **Identifying Symptoms**:
- Common symptoms of pneumonia include sharp chest pain, fever, chills, body aches, a runny nose, and continuous coughing. Recognizing these symptoms is important for understanding the condition.

3. **Determining the Causative Agents**:
- Pneumonia can be caused by various pathogens, including bacteria, viruses, and fungi. However, in this context, we are specifically looking for bacterial causes.

4. **Evaluating the Options**:
- We have several options to consider:
- **A. Plasmodium**: This is incorrect as Plasmodium is responsible for malaria, not pneumonia.
- **B. Salmonella typhi**: This is also incorrect as it causes typhoid fever, not pneumonia.
- **C. Haemophilus influenzae**: This is a correct option as it is known to cause pneumonia, along with Streptococcus pneumoniae.

5. **Conclusion**:
- After evaluating the options, the correct answer for the causative agent of pneumonia that infects lung alveoli is **C. Haemophilus influenzae**.