A genetic muscular disorder is

Options

A. osteoporosis
B. muscular dystrophy
C. myansthenia gravis
D. botulism

Answer

To solve the question "A genetic muscular disorder is," we need to analyze the options provided and identify which one is classified as a genetic muscular disorder.

### Step-by-Step Solution:

1. **Understanding Genetic Muscular Disorders**:
- Genetic muscular disorders are conditions that affect muscle function and are caused by genetic mutations. These disorders typically lead to progressive weakness and loss of muscle mass.

2. **Analyzing the Options**:
- **Option A: Osteoporosis**: This is a condition characterized by weakened bones and is not primarily a muscular disorder.
- **Option B: Muscular Dystrophy**: This is a group of genetic disorders that result in progressive weakness and loss of muscle mass due to the degeneration of muscle fibers.
- **Option C: Myasthenia Gravis**: This is an autoimmune disorder that affects the communication between nerves and muscles, but it is not genetic in origin.
- **Option D: Botulism**: This is caused by a toxin from bacteria and is not a genetic disorder.

3. **Identifying the Correct Answer**:
- Among the options, **Muscular Dystrophy** (Option B) is the only condition that is classified as a genetic muscular disorder. It is characterized by progressive weakness and loss of muscle mass due to abnormal genes that interfere with protein production necessary for healthy muscle formation.

4. **Conclusion**:
- Therefore, the correct answer to the question "A genetic muscular disorder is" is **Option B: Muscular Dystrophy**.