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': 'Characteristic feature of acute inflammation is: \nSelect and explain. \nA. Vasoconstriction, B. Vascular stasis, C. Vasodilatation and increased vascular permeability, D. Margination of leucocytes', 'role': 'user'}, {'content': 'Answer: C \nExplanation: . Vasodilatation and increased vascular permeability', 'role': 'assistant'}]