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 recommended dose of lignocaine with epinephrine: \nSelect and explain. \nA. 5 mg/kg. body weight, B. 7 mg/kg. body weight, C. 10 mg/kg. body weight, D. 15 mg/kg. body weight', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]