Sometime due to genetic and other unknown reasons, the body attacks self-cells .this results in damage to the body and is called

Options

A. Allergy
B. Auto-immunity
C. Immunisation
D. Contact inhibition

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that due to genetic and other unknown reasons, the body attacks its own cells, leading to damage. We need to identify the term that describes this phenomenon.

2. **Identifying the Condition**: The condition where the immune system mistakenly attacks the body’s own cells is known as "autoimmunity." This is a result of the immune system failing to distinguish between self-cells (the body’s own cells) and non-self-cells (foreign invaders).

3. **Mechanism of Autoimmunity**: In a healthy immune system, there is a mechanism that allows the body to recognize and differentiate between self and non-self cells. However, in autoimmune conditions, this recognition fails, leading to the immune system attacking its own tissues.

4. **Examples of Autoimmune Diseases**: There are several diseases that fall under the category of autoimmunity. Some common examples include:
- Type 1 Diabetes
- Myasthenia Gravis
- Graves' Disease
- Vitiligo

5. **Conclusion**: Therefore, the correct term for the condition where the body attacks its own cells due to genetic and other unknown reasons is "autoimmunity."

**Final Answer**: Autoimmunity

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