Granulocytes are formed in

Options

A. Thymus
B. Bone marrow
C. Kidney
D. Liver

Answer

### Step-by-Step Solution:

1. **Understanding Granulocytes**:
- Granulocytes are a type of white blood cells (WBCs) or leukocytes. They are characterized by the presence of granules in their cytoplasm.
- There are three main types of granulocytes: basophils, eosinophils, and neutrophils.

2. **Formation of Granulocytes**:
- Granulocytes are produced in the bone marrow, which is the primary site for the formation of blood cells, including all types of leukocytes.

3. **Other Sites of Blood Cell Formation**:
- While granulocytes are formed in the bone marrow, it's important to note that other blood cells have different sites of formation:
- Lymphocytes mature in the thymus.
- The kidney produces erythropoietin, which is essential for the formation of red blood cells (RBCs).
- In the fetus, the liver serves as a major site for blood cell formation.

4. **Conclusion**:
- Therefore, the answer to the question "Granulocytes are formed in" is the **bone marrow**.

### Final Answer:
Granulocytes are formed in the **bone marrow**.

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