To which category multiple sclerosis belong?

Options

A. Immunodeficiency diseases
B. Auto-immune diseases
C. Hypersensitivity
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks to identify the category to which multiple sclerosis belongs.

2. **Identifying Multiple Sclerosis**: Multiple sclerosis (MS) is a condition that affects the central nervous system (CNS). It is important to recognize its characteristics and how it affects the body.

3. **Defining Autoimmune Disease**: An autoimmune disease is a condition where the immune system mistakenly attacks the body's own tissues. In the case of multiple sclerosis, the immune system attacks the myelin sheath that covers nerve fibers in the CNS.

4. **Analyzing the Options**:
- Option A: Immunodeficiency disease - This refers to conditions where the immune system is unable to function properly, which is not applicable to MS.
- Option B: Autoimmune diseases - This is applicable as MS is characterized by the immune system attacking the CNS.
- Option C: Hypersensitivity - This involves exaggerated immune responses but does not specifically relate to MS.
- Option D: All of the above - This cannot be correct since not all categories apply to MS.

5. **Conclusion**: Based on the analysis, multiple sclerosis is categorized as an autoimmune disease. Therefore, the correct answer is **Option B: Autoimmune diseases**.