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: Pediatrics
Most common cause of Rapid progressive glomerulonephritis in children is 
Select and explain. 
A. Good Pasteur syndrome, B. Membranous glomerulonephritis, C. Ig A nephropathy, D. Pauci - immune glomerulonephritis
D: Pauci - immune glomerulonephritis
Answer: D: Pauci - immune glomerulonephritis 
Explanation: Pauci - immune glomerulonephritis like Churg Strauss, Wegener's glomerulonephritis have highest risk for RPGN.