Multiple sclerosis is caused by attack of antibodies over

Options

A. Sarcolemma of muscle cells
B. Cartilage cover
C. Myelin sheath of nerve cells
D. Periosteum

Answer

**Step-by-Step Solution:**

1. **Understanding Multiple Sclerosis**: Multiple sclerosis (MS) is an autoimmune disorder where the immune system mistakenly attacks the body's own cells. It primarily affects the central nervous system.

2. **Identifying the Target of the Immune Attack**: In MS, the immune system specifically targets the myelin sheath, which is the protective covering that surrounds nerve fibers. This sheath is crucial for the proper conduction of electrical impulses along the nerves.

3. **Analyzing the Options**:
- **Option 1**: Sarcolemma of muscle cells - This is not the target in MS.
- **Option 2**: Cartilage cover - This is also not related to MS.
- **Option 3**: Myelin sheath of nerve cells - This is the correct target in MS.
- **Option 4**: Periosteum - This is the outer fibrous layer covering bones and is not involved in MS.

4. **Conclusion**: Based on the information, the correct answer is **Option 3: Myelin sheath of nerve cells**. The antibodies attack this sheath, leading to symptoms such as impaired vision and movement.