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 of the following is long acting local anesthetic > 2hrs – a) Bupivacaineb) Prilocainec) Etidocained) Dibucainee) Tetracaine \nSelect and explain. \nA. bce, B. acde, C. abcd, D. abde', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Short duration (< 30 min) :- Chlorprocaine, procaine.\nModerate duration (30-90 min) :- Lignocaine, mepivacaine, Prilocaine, cocaine.\nLong duration (> 120 min) :- Bupivacaine, levobupivacaine, Tetracaine, Etodicaine, Ropivacaine, Dibucaine.', 'role': 'assistant'}]