Which of the following is an example of progressive degeneration disease ?

Options

A. Muscular dystrophy
B. Alzheimer's disease
C. Cystic fibrosis
D. All of these

Answer

To determine which of the following is an example of a progressive degeneration disease, we need to understand what progressive degeneration means. It refers to diseases where tissues and organs gradually deteriorate over time.

### Step-by-Step Solution:

1. **Define Progressive Degeneration Disease**:
- Progressive degeneration diseases are characterized by the gradual deterioration of tissues and organs, leading to a decline in function over time.

2. **Analyze the Options**:
- We will look at the diseases mentioned in the question: Muscular Dystrophy, Alzheimer's Disease, and Cystic Fibrosis.

3. **Muscular Dystrophy**:
- Muscular dystrophy is a genetic disorder that leads to progressive weakness and loss of muscle mass. It is indeed a progressive degeneration disease as it worsens over time.

4. **Alzheimer's Disease**:
- Alzheimer's disease is a progressive neurodegenerative disorder that leads to cognitive decline and memory loss. This also fits the definition of a progressive degeneration disease.

5. **Cystic Fibrosis**:
- Cystic fibrosis is a genetic disorder that primarily affects the lungs and digestive system. While it can lead to progressive complications, it is not typically classified as a progressive degeneration disease in the same sense as muscular dystrophy or Alzheimer's.

6. **Conclusion**:
- Based on the definitions and characteristics of these diseases, both Muscular Dystrophy and Alzheimer's Disease are examples of progressive degeneration diseases. However, if only one option is to be selected, Alzheimer's Disease is often highlighted as a classic example of a progressive neurodegenerative disease.

### Final Answer:
- **Alzheimer's Disease** is an example of a progressive degeneration disease.