Which of these are viral diseases?

Options

A. Polio, mumps
B. Influenza, small pox
C. Chiken pox, measles
D. All

Answer

To determine which of the listed diseases are viral diseases, we will analyze each disease mentioned in the question and identify the causative agent for each.

### Step-by-Step Solution:

1. **Identify the Diseases:**
The question lists several diseases: polio, mumps, influenza, smallpox, chickenpox, and measles.

2. **Analyze Each Disease:**
- **Polio:** Caused by the poliovirus. This is a viral disease.
- **Mumps:** Caused by the paramyxovirus. This is also a viral disease.
- **Influenza:** Caused by the influenza virus. This is a viral disease, commonly known as the flu.
- **Smallpox:** Caused by the variola virus. This is a viral disease.
- **Chickenpox:** Caused by the varicella-zoster virus. This is a viral disease.
- **Measles:** Caused by the morbilli virus. This is a viral disease.

3. **Conclusion:**
All the diseases listed (polio, mumps, influenza, smallpox, chickenpox, and measles) are caused by viruses. Therefore, the answer to the question is that all of these diseases are viral diseases.

### Final Answer:
**Option D: All are viral diseases.**

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