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: Medicine
[{'content': 'Most common renal pathology in shock: \nSelect and explain. \nA. Acute tubular necrosis, B. Acute cortical necrosis, C. Renal vein thrombosis, D. Acute medullar necrosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a', 'role': 'assistant'}]