Granulocytes are produced in

Options

A. Liver
B. Bone marrow
C. Spleen
D. None of these.

Answer

### Step-by-Step Solution:

1. **Understanding Granulocytes**: Granulocytes are a type of white blood cell (WBC) that contain granules in their cytoplasm. They play a crucial role in the immune response and defense mechanisms of the body.

2. **Types of Granulocytes**: There are three main types of granulocytes:
- Neutrophils
- Eosinophils
- Basophils

3. **Production of Granulocytes**: Granulocytes are produced in the bone marrow. This is the primary site for the development of all types of granulocytes.

4. **Elimination of Other Options**:
- **Liver**: The liver is not involved in the production of granulocytes; it plays a role in other functions such as detoxification and metabolism.
- **Spleen**: While the spleen is involved in the immune response and the storage of blood cells, it is not the primary site for the production of granulocytes.
- **None of these**: This option is also incorrect since granulocytes are indeed produced in the bone marrow.

5. **Conclusion**: Therefore, the correct answer to the question "Granulocytes are produced in" is **bone marrow**.

### Final Answer:
Granulocytes are produced in **bone marrow**.

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