Identify the white blood cells which increase during allergy.

Options

A. Monocytes
B. Platelets
C. Neutrophils
D. Eosinophils

Answer

**Step-by-Step Solution:**

1. **Understanding White Blood Cells (WBCs):** White blood cells are an essential part of the immune system, helping the body to fight infections and other diseases. There are different types of WBCs, each with specific functions.

2. **Identifying the Types of WBCs:** The main types of white blood cells include:
- **Monocytes:** These cells are involved in fighting infections by engulfing pathogens.
- **Neutrophils:** These are the first responders to microbial infection and are crucial in the defense against bacteria and fungi.
- **Eosinophils:** These cells play a significant role in the body's response to allergens and are involved in combating parasitic infections.

3. **Understanding the Role of Eosinophils in Allergies:** Eosinophils are particularly important in allergic reactions. When an allergen (a substance that causes an allergic reaction) enters the body, eosinophils increase in number. They release substances that can lead to allergy symptoms such as sneezing, coughing, and inflammation.

4. **Conclusion:** Based on the information about the different types of white blood cells and their functions, the white blood cells that increase during an allergy are **eosinophils**.

**Final Answer:** Eosinophils increase during allergies.

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