Among the following diseases Poliomyelitis, Chikungunya, Hansen's disease, cholera, Mumps, Hepatitis A. How many of the above, mentioned disease is caused by virus?

Options

A. 6
B. 3
C. 4
D. 2

Answer

To determine how many of the listed diseases are caused by viruses, we will analyze each disease one by one.

1. **Poliomyelitis**: This disease is caused by the poliovirus. Therefore, it is a viral disease.

2. **Chikungunya**: This disease is caused by the chikungunya virus, which is transmitted by mosquitoes. Thus, it is also a viral disease.

3. **Hansen's disease**: Commonly known as leprosy, this disease is caused by the bacterium Mycobacterium leprae. Therefore, it is a bacterial disease.

4. **Cholera**: This disease is caused by the bacterium Vibrio cholerae. Hence, it is a bacterial disease.

5. **Mumps**: This disease is caused by the mumps virus. Thus, it is a viral disease.

6. **Hepatitis A**: This disease is caused by the hepatitis A virus. Therefore, it is also a viral disease.

Now, let's summarize the findings:
- Viral diseases: Poliomyelitis, Chikungunya, Mumps, Hepatitis A (4 diseases)
- Bacterial diseases: Hansen's disease, Cholera (2 diseases)

In total, out of the six diseases listed, **four** are caused by viruses.

**Final Answer**: 4 diseases are caused by viruses.

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