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': 'Rubor in inflammation is due to - rpt Q24 \nSelect and explain. \nA. Dilation of aerioles, B. Increased vascular permeability, C. Increased viscocity of blood, D. Edema', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Harshmohan textbook of pathology 7th edition. persistent progressive vasodilatation seen in acute inflammatory response due to dilatation of aerioles but to a lesser extend affect other components of micro circulation like venules and capillaries. Vasodilatation result in increased blood volume in the microvascular bed of the area which is responsible for redness/ rubor and warmth at the site of acute inflammation. .', 'role': 'assistant'}]