This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
[{'content': 'RPGN is caused by \nSelect and explain. \nA. Wegeners granulomatosis, B. Good pasteur syndrome, C. Microscopic polyangitis, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Refer Robbins pageRapidly progressive glomerulonephritis (RPGN) is a syndrome associated with severe glomerular injury, but does not denote a specific etiologic form of glomerulone- phritis. It is characterized by rapid and progressive loss of renal function associated with severe oliguria and signs of nephritic syndrome; if untreated, death from renal failure occurs within weeks to months. The most common histologic picture is the presence of crescents in most of the glomeruli (crescentic glomerulonephritis) no 9/e Pg 912', 'role': 'assistant'}]