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': "Small vessel vasculitis are -a)  Classical PANb)  Wegner's granulomatosisc) Giant cell arteritis d) HSPe) Churg-strauss syndrome \nSelect and explain. \nA. bde, B. ade, C. ace, D. bce", 'role': 'user'}, {'content': 'Answer: A \nExplanation: a) Large vessel vasculitis: Giant cell arteritis (temporal arteritis), Takayasu arteritis, Cogan\xa0syndrome.\nb) Medium vessel vasculitis: PAN (classical PAN), kawasaki disease, Buerger’s disease.\nc) Small vessel vasculitis ; HSP, Wegner’s granulomatosis, microscopic polyangitis, churg strauss\xa0syndrome, Cryoglobulinemia, SLE, idiopathic crescentic glomerulonephritis, Bechet’s syndrome, renal\xa0limited vasculitis', 'role': 'assistant'}]