Largest leukocytes `:-`

Options

A. Neutrophil
B. Basophil
C. Monocyte
D. Lympocyte

Answer

### Step-by-Step Solution:

1. **Understanding Leukocytes**:
- Leukocytes, or white blood cells (WBCs), are crucial components of the immune system. They help protect the body against infections and diseases.

2. **Types of Leukocytes**:
- There are several types of leukocytes, including neutrophils, basophils, monocytes, and lymphocytes. Each type has a different size and function.

3. **Comparing Sizes**:
- To determine which leukocyte is the largest, we need to compare their sizes in micrometers (µm):
- **Neutrophils**: 9 to 15 µm
- **Basophils**: 14 to 16 µm
- **Monocytes**: 15 to 18 µm
- **Lymphocytes**: 6 to 9 µm

4. **Identifying the Largest**:
- From the size ranges provided:
- Neutrophils: 9 to 15 µm
- Basophils: 14 to 16 µm
- Monocytes: 15 to 18 µm
- Lymphocytes: 6 to 9 µm
- The monocytes have the largest size range, measuring from 15 to 18 µm.

5. **Conclusion**:
- Therefore, the largest leukocytes are **monocytes**.