What are the pathogens of following diseases?
(a) Pneumonia (b) Measles (c) Elephantiasis

Explanation

To answer the question regarding the pathogens of the specified diseases, we will identify the causative agents for each disease one by one.

### Step-by-Step Solution:

1. **Identify the Pathogen for Pneumonia:**
- Pneumonia is primarily caused by bacteria. The main pathogens responsible for pneumonia include:
- **Streptococcus pneumoniae**: This is the most common bacterial cause of pneumonia.
- **Haemophilus influenzae**: This bacterium can also cause pneumonia, especially in children and individuals with weakened immune systems.
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