Rheumatoid arthritis is an example of

Options

A. deficiency disease
B. genetic disorder
C. autoimmune disorder
D. neuronal degeneration

Answer

**Step-by-Step Solution:**

1. **Identify the Nature of Rheumatoid Arthritis:**
- Rheumatoid arthritis is primarily recognized as a chronic condition. It is characterized by long-lasting inflammation in the body.

2. **Understand the Affected Areas:**
- This disorder specifically affects the joints in the body. Commonly affected joints include those in the hands and feet.

3. **Explore the Mechanism:**
- In rheumatoid arthritis, the immune system mistakenly attacks the body’s own tissues, including the joints. This is a key aspect of the disease.

4. **Classify the Disorder:**
- Given that the immune system is attacking its own tissues, rheumatoid arthritis is classified as an autoimmune disorder. This means that the body’s defense mechanism is improperly targeting its own cells.

5. **Eliminate Other Options:**
- It is important to note that rheumatoid arthritis is not a deficiency disease, genetic disorder, or a neuronal degradation condition. This further confirms its classification as an autoimmune disorder.

6. **Conclusion:**
- Therefore, the correct classification for rheumatoid arthritis is that it is an autoimmune disorder.

**Final Answer:**
Rheumatoid arthritis is an example of an autoimmune disorder.

---