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: Pediatrics
[{'content': 'Least likely cause of renal papillary necrosis? \nSelect and explain. \nA. Sickle cell disease, B. Analgesic nephropathy, C. Posterior urethral valves, D. Diabetes with UTI', 'role': 'user'}, {'content': "Answer: C \nExplanation: c. Posterior urethral valves(Ref: Nelson's 20/e p 2562-2567Ghai 8/e p 485-486)Sickle cell disease, use of analgesics and Diabetes are important causes of Renal papillary necrosis.", 'role': 'assistant'}]