This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia, Subject name: Pharmacology
[{'content': 'Which of the following is NOT an amide : \nSelect and explain. \nA. Procaine, B. Lignocaine, C. Bupivacaine, D. Mepivacaine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Procaine 61]Explained earlier", 'role': 'assistant'}]