The most numerous leukocytes are the

Options

A. eosinophils
B. monocytes
C. lymphocytes
D. neutrophilis

Explanation

### Step-by-Step Solution:

1. **Understanding Leukocytes**: Leukocytes, also known as white blood cells, are crucial components of the immune system. They help the body fight infections and other diseases.

2. **Types of Leukocytes**: There are five main types of leukocytes:
- **Neutrophils**
- **Eosinophils**
- **Basophils**
- **Lymphocytes**
- **Monocytes**

3. **Percentage Composition**:
- **Neutrophils**: They constitute about 60-70% of the total leukocyte count. They are phagocytic in nature, meaning they can engulf and digest pathogens.
- **Eosinophils**: They make up about 2-4% of leukocytes and are primarily involved in combating parasitic infections.
- **Basophils**: These are less than 1% of leukocytes and play a role in inflammatory responses.
- **Lymphocytes**: They account for about 20-25% of leukocytes and are essential for adaptive immunity (B cells and T cells).
- **Monocytes**: They represent about 3-8% of leukocytes and differentiate into macrophages and dendritic cells.

4. **Identifying the Most Numerous**: Based on the percentage composition, neutrophils are the most numerous leukocytes, making up 60-70% of the total leukocyte count.

5. **Conclusion**: Therefore, the answer to the question "The most numerous leukocytes are the" is **Neutrophils**.