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': 'In acute inflammation, excessive fluid seepage occurs due to increased permeability of? \nSelect and explain. \nA. Venules, B. Capillaries, C. Arterioles, D. Arterioles and capillaries', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Postcapillary venules are an important point of interchange between the Lumen of the vessels and the\xa0surrounding tissue. Moreover, both vascular leakage and Leukocyte exudation occur preferentially in\xa0venules in many types of inflammation.\nIncreased vascular permeability is the hallmark of acute inflammation.', 'role': 'assistant'}]