A cainical condition in which the bond marrow stops producing WBC, is known as

Options

A. Leukaemia
B. Apoptosis
C. Leucopenia
D. Anaemia

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for a clinical condition in which the bone marrow stops producing white blood cells (WBCs).

2. **Identifying WBCs:**
White blood cells are also known as leukocytes. They play a crucial role in the immune system by helping the body fight infections.

3. **Terminology for Decrease in WBCs:**
When there is a decrease in the number of WBCs, the term used is "leucopenia." The suffix "penia" indicates a deficiency or decrease in the number of cells.

4. **Differentiating Related Terms:**
- **Leukemia:** This term refers to a type of cancer that results in the abnormal increase of WBCs, not a decrease.
- **Anemia:** This term refers to a deficiency of red blood cells (RBCs) or hemoglobin, not WBCs.

5. **Conclusion:**
Based on the definitions and terms discussed, the clinical condition in which the bone marrow stops producing WBCs is known as "leucopenia."

**Final Answer:**
Leucopenia

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