Which of the following is not a viral disease ?

Options

A. Pollo
B. Rables
C. smallpox
D. Plague

Answer

To determine which of the following is not a viral disease, we need to analyze each option and identify the causative agents of the diseases listed.

1. **Polio**:
- Polio is caused by the poliovirus.
- Therefore, polio is a viral disease.

2. **Rabies**:
- Rabies is caused by the rabies virus (scientifically known as rabies lyssavirus).
- Thus, rabies is also a viral disease.

3. **Smallpox**:
- Smallpox is caused by the variola virus.
- Hence, smallpox is a viral disease as well.

4. **Plague**:
- Plague is caused by the bacterium Yersinia pestis.
- Therefore, plague is not a viral disease; it is a bacterial disease.

From the analysis above, the disease that is not viral is **plague**.

**Final Answer**: Plague

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