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
Small vessel vasculitis are -a)  Classical PANb)  Wegner's granulomatosisc) Giant cell arteritis d) HSPe) Churg-strauss syndrome 
Select and explain. 
A. bde, B. ade, C. ace, D. bce
A: bde
Answer: A: bde 
Explanation: a) Large vessel vasculitis: Giant cell arteritis (temporal arteritis), Takayasu arteritis, Cogan syndrome.
b) Medium vessel vasculitis: PAN (classical PAN), kawasaki disease, Buerger’s disease.
c) Small vessel vasculitis ; HSP, Wegner’s granulomatosis, microscopic polyangitis, churg strauss syndrome, Cryoglobulinemia, SLE, idiopathic crescentic glomerulonephritis, Bechet’s syndrome, renal limited vasculitis