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': 'Most 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: Increased vascular permeability leading to the escape of protein rich fluid into the interstitium is the hallmark of acute inflammation. Ref: Robbins pathologic basis of disease 6th edn/page 53.', 'role': 'assistant'}]