This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basic Concepts and Vascular changes of Acute Inflammation, Subject name: Pathology
All of the following are mediators of acute inflammation except: 
Select and explain. 
A. Angiotensin, B. Prostaglandin E2, C. Kallikrein, D. C3a
A: Angiotensin
Answer: A: Angiotensin 
Explanation: Kallikreins like:- Bradykinin PGs Complement components are mediators of acute inflammation.