Choose the incorrect pair from the following

Options

A. histamine-basophils
B. heparin-mast cell
C. hirudin-eosinophil
D. granules-neutrophils

Answer

To solve the question "Choose the incorrect pair from the following," we will analyze each of the provided pairs to determine which one is incorrect.

### Step-by-Step Solution:

1. **Examine the First Pair: Histamine and Vasophils**
- Histamine is a chemical that is released by basophils (not vasophils) during an immune response.
- Basophils are a type of white blood cell that contains histamine, which promotes vasodilation and increases blood flow to tissues during inflammation.
- **Conclusion**: This pair is incorrect because histamine is associated with basophils, not vasophils.

2. **Examine the Second Pair: Heparin and Mast Cells**
- Heparin is an anticoagulant that is indeed released by mast cells.
- Mast cells play a role in the inflammatory response and release heparin to prevent blood clotting in the area of inflammation.
- **Conclusion**: This pair is correct.

3. **Examine the Third Pair: Engulfing Incoming Foreign Particles**
- This statement refers to the function of phagocytes (like macrophages and neutrophils) which engulf foreign particles such as bacteria and viruses.
- This is a correct description of the immune response.
- **Conclusion**: This pair is correct.

### Final Answer:
The incorrect pair is **Histamine and Vasophils**.