This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Small vessel vasculitis are - 
Select and explain. 
A. Classical PAN, B. Wegner's granulomatosis, C. Giant cell aeritis, D. All
B: Wegner's granulomatosis
Answer: B: Wegner's granulomatosis 
Explanation: Inflammation of vessel wall is called vasculitis. o Of these systemic necrotizing vasculitis, several types affect the aoa and medium sized vessels, but most affect small vessels, such as aerioles, venules, and capillaries --> small vessel vasculitis. Large vessel vasculitis Medium vessel vasculitis Small vessel vasculitis o Giant cell aeritis o Polyaeritis nodosa ANACA positive ANCA negative (Temporal aeritis) o Kawasaki disease o Wegner&;s granulomatosis o Bechet&;s syndrome o Takayasu aeritis o Buerger&;s disease o Microscopic polyangitis o Hypersensitivity o Cogan syndrome o Churg strauss syndrome o Uicarial vasculitis o Drug induced REF: Harrison book of internal medicine 21ST EDITION