This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Cardinal event of acute inflammation \nSelect and explain. \nA. Vasoconstriction, B. Stasis of Circulation, C. Vasodilatation and| vascular permeability, D. Margination of leukocytes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]