This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia Machine, Subject name: Anaesthesia
[{'content': 'All are amide local anesthetic except- \nSelect and explain. \nA. Cocaine, B. Lignocaine, C. Prilocaine, D. Bupivacaine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cocaine is ester local anesthetic. Local Anesthetic divided into two groups Amino ester - S.A Cociane Procains Chloroprocaine L.A Benzocaine Tetracaine Amino amide I.A Lignocaine Prilocaine Mepivacaine L.A Bupivacaine Ropivacaine Levobupivacaine Dibucaine', 'role': 'assistant'}]