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': 'Long duration anesthesia is achieved by \nSelect and explain. \nA. 2% Lidocaine HCL + Epinephrine 1:2,00,000, B. 3% Mepivacaine HCL, C. 4% Prilocaine HCL + Epinephrine 1:2,00,000, D. 0.5% Bupivacaine+ Epinephrine 1:2,00,000', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]