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 one of the following is not an amide – \nSelect and explain. \nA. Lignocaine, B. Procaine, C. Bupivacaine, D. Dibucaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Esters (aminoesters) :- Procaine, chlorprocaine, tetracaine (amethocaine), Benzocaine, Cocaine.\nAmides (aminoamides) Lignocaine, Mepivacaine, Prilocaine, Bupivacaine, Etidocaine, Ropivacaine , Dibucaine.', 'role': 'assistant'}]