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': 'Pauci immune glomerulonephritis is seen in the following condition: \nSelect and explain. \nA. After transplant in Alpers, B. Microscopic polyangiitis, C. Henoch-Schonlein nephritis, D. Lupus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Pauci-immune necrotizing glomerulonephritis is caused by the following systemic ANCA-associated small-vessel vasculitides: Granulomatosis with polyangiitis (formerly known as Wegener granulomatosis) Microscopic polyangiitis Churg-Strauss disease Ref: Watnick S., Dirkx T. (2013). Chapter 22. Kidney Disease. In M.A. Papadakis, S.J. McPhee, M.W. Rabow (Eds), CURRENT Medical Diagnosis & Treatment 2013.', 'role': 'assistant'}]