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
Which of the following is true about Acute Tubular Necrosis 
Select and explain. 
A. Urine specific gravity > 1.020, B. Urine osmolality >350 mosmol/kg, C. Urine Na < l Omeq/L, D. Blood urea : creatinine ratio < 20
D: Blood urea : creatinine ratio < 20
Answer: D: Blood urea : creatinine ratio < 20 
Explanation: Answer is D (Blood urea creatinine ratio < 20):