Which one of the following is a viral disease that weakens the
muscles ?

Options

A. Atrophy
B. Poliomyelitis
C. Dystrophy
D. Muscular hypertrophy

Answer

To determine which of the following is a viral disease that weakens the muscles, we will analyze each option provided:

1. **Atrophy**: This condition refers to the decrease in size or wasting away of a tissue or organ. It is not caused by a virus but can occur due to various factors such as lack of use, aging, or disease.

2. **Poliomyelitis**: Commonly known as polio, this is a viral disease caused by the poliovirus. It specifically affects the motor neurons in the spinal cord, leading to muscle weakness and flaccid paralysis. This makes it a viral disease that indeed weakens muscles.

3. **Dystrophy**: This term generally refers to a group of disorders characterized by weakness and loss of muscle mass. While it involves muscle weakness, it is not caused by a virus but rather by genetic factors or other underlying conditions.

4. **Muscular Hypertrophy**: This is the increase in muscle size and mass, typically resulting from resistance training or heavy weightlifting. It is not a disease and does not involve muscle weakening.

After analyzing all the options, the only viral disease that weakens the muscles is **poliomyelitis**.

**Final Answer**: Poliomyelitis

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