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': 'Laudanosine is the metabolite of: \nSelect and explain. \nA. Suxamethonium, B. Pancuronium, C. Atracurium, D. Vecuronium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Atracurium', 'role': 'assistant'}]