Which one of the following set of diseases belongs to the same category of causative agents ?

Options

A. Tetanus, Typhoid , Pneumonia
B. Dengue, Typhoid , Malaria
C. Chikungunya , Dengue , Malaria
D. Mumps , Polio , Plague.

Answer

To solve the question "Which one of the following set of diseases belongs to the same category of causative agents?", we will analyze each option provided and identify the causative agents of the diseases listed.

### Step-by-Step Solution:

1. **Analyze Option 1: Tetanus, Typhoid, and Pneumonia**
- **Tetanus**: Caused by the bacterium *Clostridium tetani*.
- **Typhoid**: Caused by the bacterium *Salmonella typhi*.
- **Pneumonia**: Caused by the bacterium *Streptococcus pneumoniae*.
- **Conclusion**: All three diseases are caused by bacteria. Therefore, this option belongs to the same category of causative agents.

2. **Analyze Option 2: Dengue, Typhoid, and Malaria**
- **Dengue**: Caused by the Dengue virus (a virus).
- **Typhoid**: Caused by the bacterium *Salmonella typhi* (a bacterium).
- **Malaria**: Caused by the parasite *Plasmodium* (a parasite).
- **Conclusion**: This option contains diseases caused by different types of agents (virus, bacterium, and parasite), so it does not belong to the same category.

3. **Analyze Option 3: Chikungunya, Dengue, and Malaria**
- **Chikungunya**: Caused by the Chikungunya virus (a virus).
- **Dengue**: Caused by the Dengue virus (a virus).
- **Malaria**: Caused by the parasite *Plasmodium* (a parasite).
- **Conclusion**: This option also contains diseases caused by different types of agents (two viruses and one parasite), so it does not belong to the same category.

4. **Final Conclusion**: The only option where all diseases are caused by the same type of agent (bacteria) is Option 1: Tetanus, Typhoid, and Pneumonia.

### Correct Answer:
**Option 1: Tetanus, Typhoid, and Pneumonia**

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