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: Surgery
[{'content': 'Maximum dose of xylocaine with out adrenaline that can be given in 60kg adults is \nSelect and explain. \nA. 500mg, B. 300mg, C. 400mg, D. 600mg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]