Which of the following is an example for auto immunity?

Options

A. Asthma
B. SCID
C. Rheumatoid arthritis
D. AIDS

Answer

**Step-by-Step Solution:**

1. **Understanding Autoimmunity**:
- Autoimmunity is a condition where the immune system mistakenly attacks the body's own cells. Normally, the immune system produces antibodies to fight foreign pathogens (like viruses and bacteria). In autoimmunity, the immune system fails to distinguish between self-cells and foreign cells, leading to the production of auto-antibodies that attack the body's own tissues.

2. **Analyzing the Options**:
- The question provides several options: Asthma, Skid, Rheumatoid Arthritis, and AIDS. We need to determine which of these is an example of an autoimmune disease.

3. **Evaluating Each Option**:
- **Asthma**: This is primarily a respiratory condition caused by environmental factors such as pollution or allergens. It is not classified as an autoimmune disease.
- **Skid (Severe Combined Immunodeficiency)**: This is a genetic disorder affecting the immune system's ability to produce T cells and B cells. It is not an autoimmune disease.
- **Rheumatoid Arthritis**: This is an autoimmune disease where the immune system attacks the joints, leading to inflammation and pain. It typically affects older adults.
- **AIDS (Acquired Immunodeficiency Syndrome)**: This is caused by the HIV virus, which weakens the immune system but is not classified as an autoimmune disease.

4. **Conclusion**:
- Among the options provided, the only condition that fits the definition of an autoimmune disease is **Rheumatoid Arthritis**.

5. **Final Answer**:
- The correct answer is **Rheumatoid Arthritis**.

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