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': 'Which of the following is an ester linked local anaesthesia – \nSelect and explain. \nA. Cocaine, B. Lidocaine, C. Bupivacaine, D. Dubicaine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]