This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'First to appear in acute inflammation is ? \nSelect and explain. \nA. Vasodilatation, B. Increased vascular permeability, C. Vasoconstriction, D. Decreased vascular permeability', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The sequence of events in acute inflammation is: Transient vasoconstriction ---- Vasodilatation ----- Increased permeability followed by Stasis Reference: Robbins and Cotran Pathologic Basis of Disease; 9th edition.', 'role': 'assistant'}]