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\tallowable dose\tof 2%\tlidocaine with\n1:100000 epinephrine for a child of 40 lbs is: \nSelect and explain. \nA. 60mg, B. 120mg, C. 180mg, D. 240mg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]