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
All of the following are mediators of acute inflammation except- 
Select and explain. 
A. Angiotensin, B. Prostaglandin E2, C. Kallikrein, D. C 3a
A: Angiotensin
Answer: A: Angiotensin 
Explanation: Ans. is 'a' i.e., Angiotensin