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': "All of the following are small vessel vasculitis, Except: \nSelect and explain. \nA. Wegner's granulomatosis, B. Microscopic polyangitis, C. Polyaeritis Nodosa, D. Henoch-Schonelin purpura", 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is C (Polyoeritis Nodosa):Classic Polyaeritis nodosa does not involve capillaries and venules and is classified as a medium vessel vasculitis.Micorscopic polyangitis (Microscopic PAN),Wegener's granulomatosis and Henoch Scholein purpura are all classified as small vessel vasculitis.", 'role': 'assistant'}]