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: Medicine
[{'content': 'Renal papillary necrosis is almost always associated with one of the following conditions : \nSelect and explain. \nA. Diabetes-mellitus, B. Analgesic-nephropathy, C. Chronic pyelonephritis, D. Post streptococcal GN', 'role': 'user'}, {'content': "Answer: A \nExplanation: Answer is A (Diabetes Mellitus): `Renal papillary necrosis, an accompaniment of acute pyelonephritis is most often seen in diabetics and is characterised by necrosis of renal papillae of one or both kidneys with sharped demarcation between necrotic and living tissue' -- Dorlands Thus while papillary necrosis is a feature of more than one conditions mentioned in the question, it is most commonly seen with diabetes mellitus.", 'role': 'assistant'}]