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': 'All of the local anaesthetics given below are amides, EXCEPT: \nSelect and explain. \nA. Lignocaine, B. Procaine, C. Prilocaine, D. Etidocaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Clinical local anesthetics belong to one of two classes: aminoamide and aminoester local anesthetics. Procaine is an ester anaesthetic. The members of Amide group are: Aicaine Bupivacaine Cinchocaine/Dibucaine Etidocaine Levobupivacaine Lidocaine/Lignocaine Mepivacaine Prilocaine Ropivacaine Trimecaine', 'role': 'assistant'}]