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
[{'content': 'In acute inflammation pain is mediated by ? \nSelect and explain. \nA. Serotonin, B. Histamine, C. Bradykinin, D. Cytokines', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Bradykinin", 'role': 'assistant'}]