Which of the following is correctly paired?

Options

A. Basophils - Are not involved in inflammatory or allergic reactions
B. Eosinophils - Stained by methylene blue
C. Monocytes - Largest leucocytes
D. Neutrophils - Kidney shaped nucleus

Answer

To solve the question "Which of the following is correctly paired?" regarding white blood cells, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding White Blood Cells (WBCs)**:
- White blood cells, also known as leukocytes or mucocytes, are crucial components of the immune system. They help in fighting infections and allergies in the body.
- WBCs are broadly classified into two categories: **Granulocytes** (which contain granules in their cytoplasm) and **Agranulocytes** (which do not contain granules).

2. **Analyzing Each Option**:
- **Option A**: "Basophils are not involved in inflammatory or allergic reactions."
- This statement is **incorrect**. Basophils are indeed involved in inflammatory and allergic reactions.

- **Option B**: "Eosinophils are stained by mineral glue."
- This statement is **incorrect**. Eosinophils are typically stained with hematoxylin and eosin, not mineral glue.

- **Option C**: "Monocytes are the largest leukocytes."
- This statement is **correct**. Monocytes are indeed the largest type of white blood cells.

- **Option D**: "Neutrophils have a kidney-shaped nucleus."
- This statement is **incorrect**. Neutrophils have a multi-lobed nucleus, typically 2 to 5 lobes, not a kidney-shaped nucleus.

3. **Conclusion**:
- After analyzing all the options, we find that **Option C** is the only correct statement: "Monocytes are the largest leukocytes."

### Final Answer:
The correctly paired option is **C: Monocytes are the largest leukocytes.**

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