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': 'Longest acting local anesthetic agent is - \nSelect and explain. \nA. Procaine, B. Lidocaine, C. Prilocaine, D. Dibucaine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Dibucaine Local Anesthetic agentsShort duration(< 30 min)Low potencyIntermediate duration (30-90 min)Intermediate potencyLong duration (> 120 min) High potencyChlorprocaine (shortest acting)LignocaincMepivacaineBupivacaineTetracaineProcainePrilocaineCocaineEtodicaineRopivacaineDibucaine (longest acting)", 'role': 'assistant'}]