This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
The vasoactive amine that causes vasodilatation, released during inflammation, is found in which of the cell: 
Select and explain. 
A. Plasma cells, B. Lymphocytes, C. Monocytes, D. Mast cells
D: Mast cells
Answer: D: Mast cells 
Explanation: None