This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
[{'content': 'Small vessel vasculitis are seen in \nSelect and explain. \nA. Wegener vasculitis, B. Microscopic polyangitis, C. Churg strauss syndrome, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: <img src=" /> Ref - researhgate.net', 'role': 'assistant'}]