This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pathology
Pauci-immune RPGN is? 
Select and explain. 
A. Good-Pasture syndrome, B. MPGN, C. Wegener granulomatosis, D. Alport's syndrome
C: Wegener granulomatosis
Answer: C: Wegener granulomatosis 
Explanation: Ans. is 'c' i.e., Wegener granulomatosis Rapidly progressive glomerulonephritisType 1 RPGN(Anti GBM antibody)Type II RPGN(Immune complex)Type III RPGN(Pauci immune)* Idiopathic* Good-pasture syndrome* Idiopathic* Post infectious* Systemic lupus erythematous* Henoch schonlein purpura* IgA nephropathy* Membranoproliferative GN* Cryoglobulinaemia* ANCA associated* Idiopathic* Wegener granulomatosis* Microscopic PAN* Microscopic polyangitis