This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Local and Regional Anesthesia), Subject name: Anaesthesia
[{'content': 'Local anaesthetic with prolonged action - \nSelect and explain. \nA. Procaine, B. Cocaine, C. Lidocaine, D. Dibucaine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Dibucaineo Dibucaine is the longest acting local anaesthetico Chlorprocaine is the shortest acting local anaesthetico Decreasing order of duration : - Dibucaine > Bupivacine = Tetracaine = Ropivacaine =Etidocaine > Prilocaine = Lignocaine = Mepivacaine = Cocaine > Procaine > Chlorprocaine.", 'role': 'assistant'}]