Activity of phagocytosis occurs through
(a) Neutrophils and monocytes
(b) Basophils and monocytes
(c) Eosinophils and monocytes
(d) Lymphocytes and neutrophils

Options

A. Neutrophils and monocytes
B. Basophils and monocytes
C. Eosinophils and monocytes
D. Lymphocytes and neutrophils

Answer

To solve the question regarding which cells are involved in the activity of phagocytosis, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Phagocytosis**:
- Phagocytosis is the process by which certain cells, known as phagocytes, engulf and digest foreign particles, bacteria, or dead cells. This is a crucial part of the immune response.

2. **Identifying Key Cells**:
- The primary cells involved in phagocytosis are white blood cells (WBCs). The main types of WBCs that perform phagocytosis include neutrophils and monocytes.

3. **Analyzing the Options**:
- **Option A**: Neutrophils and monocytes - Both of these cells are known to actively participate in phagocytosis.
- **Option B**: Basophils and monocytes - Basophils are not primarily involved in phagocytosis.
- **Option C**: Eosinophils and monocytes - Eosinophils are more involved in combating parasitic infections and allergic reactions, not primarily phagocytosis.
- **Option D**: Lymphocytes and neutrophils - Lymphocytes are primarily involved in adaptive immunity and not in phagocytosis.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Option A: Neutrophils and monocytes**, as both of these cell types are directly involved in the phagocytosis process.

### Final Answer:
**(a) Neutrophils and monocytes**

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