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': "Papillary necrosis is seen in all except \nSelect and explain. \nA. NSAID's, B. DM, C. Sickle cell anemia, D. Shock", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of papillary necrosis*Diabetes mellitus*Sickle cell disease/trait*Analgesics*Urinary tract obstruction *Renal tuberculosis ( Ref: Robbins 8/e p934)', 'role': 'assistant'}]