Most active phagocytic white blood cells are

Options

A. neutrophils and monocytes
B. neurtrophils and eosinophils
C. eosinophils and lymphocytes
D. lymphocytes and macrophages

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for the most active phagocytic white blood cells. Phagocytosis is the process by which certain cells engulf and digest microorganisms and cellular debris.

2. **Identify the Types of White Blood Cells (WBCs)**: There are several types of white blood cells, including neutrophils, monocytes, eosinophils, basophils, and lymphocytes. Each type has different functions in the immune response.

3. **Focus on Phagocytic Cells**: The main phagocytic cells among the WBCs are neutrophils and monocytes. Neutrophils are known for their rapid response to infection, while monocytes can differentiate into macrophages, which are also phagocytic.

4. **Evaluate the Options**:
- **Option A**: Neutrophils and monocytes - Both are known for their phagocytic activity.
- **Option B**: Neutrophils and eosinophils - Eosinophils are primarily involved in combating multicellular parasites and allergic reactions, not phagocytosis.
- **Option C**: Eosinophils and lymphocytes - Lymphocytes (B and T cells) are primarily involved in adaptive immunity and are not phagocytic.
- **Option D**: Lymphocytes and macrophages - While macrophages are phagocytic, lymphocytes are not.

5. **Conclusion**: The most active phagocytic white blood cells are neutrophils and monocytes. Therefore, the correct answer is **Option A: Neutrophils and Monocytes**.

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