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
Mediator of acute inflammation not derived from cell is - 
Select and explain. 
A. Histamine, B. Leukotrienes, C. Kinins, D. Cytokines
C: Kinins
Answer: C: Kinins 
Explanation: . Kinins