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': 'Which of the following is true about Acute Tubular Necrosis \nSelect and explain. \nA. Urine specific gravity > 1.020, B. Urine osmolality >350 mosmol/kg, C. Urine Na < l Omeq/L, D. Blood urea : creatinine ratio < 20', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (Blood urea creatinine ratio < 20):', 'role': 'assistant'}]