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: Unknown
[{'content': 'Diapedesis primarily occurs in? \nSelect and explain. \nA. Arterioles, B. Venules, C. Capillaries, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' i.e. Venules o Diapedesis is the process of transmigration of leukocytes across the endotheliumo Leukocyte diapedesis, similar to increased vascular permeability, occurs predominantly in the venules (except in lungs, where it occurs in capillaries).", 'role': 'assistant'}]