What is true of eosinophils ?

Options

A. have bilobed nucleus
B. pagocytic in function
C. stain with basic dyes
D. agranulocytes

Answer

### Step-by-Step Solution

1. **Understanding Eosinophils**: Eosinophils are a type of white blood cell (WBC) that play a significant role in the immune system, particularly in combating parasitic infections and in allergic reactions.

2. **Nucleus Structure**: One of the defining characteristics of eosinophils is that they have a bilobed nucleus. This means that the nucleus is divided into two lobes, which is a true statement about eosinophils.

3. **Phagocytic Function**: Eosinophils are often mistaken for being phagocytic (cells that can engulf and digest pathogens). However, this is incorrect. Eosinophils do not primarily function as phagocytes; instead, they are involved in controlling mechanisms related to asthma and allergies.

4. **Staining Properties**: Eosinophils do not stain with basic dyes; they are stained with an acidic dye called eosin. This means that the statement claiming they stain with basic dyes is also incorrect.

5. **Classification**: Eosinophils are classified as granulocytes, not agranulocytes. Granulocytes have granules in their cytoplasm that contain enzymes and proteins, which are important for their immune functions. Eosinophils contain around 200 granules.

6. **Conclusion**: The only true statement about eosinophils from the provided options is that they have a bilobed nucleus.

### Final Answer
The true statement about eosinophils is that they have a bilobed nucleus.

---