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': 'Longest acting among muscle relaxant is? \nSelect and explain. \nA. Doxacurium, B. Rocuronium, C. Vecuronium, D. Atracurium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Doxacurium Among the given options, only doxacurium is long acting. See explanation- 4 of session- 3.", 'role': 'assistant'}]