A water borne disease is

Options

A. Small pox
B. Tuberculosis
C. Malaria
D. Cholera

Answer

To determine which of the given options is a waterborne disease, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Identify the options**: The options provided are:
- A) Smallpox
- B) Tuberculosis
- C) Malaria
- D) Cholera

2. **Analyze Smallpox**:
- Smallpox is caused by the variola virus.
- It is not transmitted through water; rather, it spreads through direct contact with infected individuals or contaminated objects.
- **Conclusion**: Smallpox is **not** a waterborne disease.

3. **Analyze Tuberculosis**:
- Tuberculosis (TB) is caused by the bacterium Mycobacterium tuberculosis.
- It is primarily an airborne disease, transmitted through the air when an infected person coughs or sneezes.
- **Conclusion**: Tuberculosis is **not** a waterborne disease.

4. **Analyze Malaria**:
- Malaria is caused by the Plasmodium parasite, which is transmitted through the bite of infected female Anopheles mosquitoes.
- It does not spread through water.
- **Conclusion**: Malaria is **not** a waterborne disease.

5. **Analyze Cholera**:
- Cholera is caused by the bacterium Vibrio cholerae.
- It is primarily transmitted through contaminated water or food, especially when sewage mixes with drinking water sources.
- **Conclusion**: Cholera **is** a waterborne disease.

6. **Final Answer**:
- After analyzing all the options, the correct answer is **Cholera**.