Set of autoimmune diseases is

Options

A. AIDS, SCID
B. Parkinson's disease, HIV
C. Allergy, cystitis
D. Myasthenia gravis, Grave's disease

Answer

To determine the set of autoimmune diseases from the given options, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Understanding Autoimmune Diseases**:
- Autoimmune diseases occur when the immune system mistakenly attacks the body's own cells, mistaking them for harmful invaders.

2. **Evaluating Each Option**:
- **AIDS**: This disease is caused by the Human Immunodeficiency Virus (HIV), which attacks the immune system itself but is not classified as an autoimmune disease.
- **SCID (Severe Combined Immunodeficiency)**: This is a genetic disorder that results in a severely compromised immune system. It is not an autoimmune disease.
- **Parkinson's Disease**: This is a neurodegenerative disorder caused by the degeneration of nerve cells in the brain. It is not autoimmune.
- **HIV**: This is a virus, not a disease, and does not fall under the category of autoimmune diseases.
- **Allergy**: Allergies are immune responses to external substances (allergens) and are not autoimmune diseases.
- **Cystitis**: This is an inflammation of the bladder, usually caused by a bacterial infection, and is not autoimmune.
- **Myasthenia Gravis**: This is an autoimmune disease where the immune system attacks the communication between nerves and muscles, leading to weakness.
- **Graves' Disease**: This is another autoimmune condition where the immune system attacks the thyroid gland, causing hyperthyroidism.

3. **Identifying Autoimmune Diseases**:
- From the analysis, the only options that qualify as autoimmune diseases are **Myasthenia Gravis** and **Graves' Disease**.

4. **Conclusion**:
- Therefore, the correct answer to the question "Set of autoimmune diseases is" includes **Myasthenia Gravis and Graves' Disease**.

### Final Answer:
The set of autoimmune diseases includes **Myasthenia Gravis and Graves' Disease**.

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