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: Anaesthesia
[{'content': 'Total cerebral metabolic failure occurs at blood flow of \nSelect and explain. \nA. 10 m1/100 gm/min, B. 20 m1/100 gm/m1, C. 30 m1/100 gm/min, D. 40 m1/100 gm/ml', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. 10 ml/100 gm/min', 'role': 'assistant'}]