This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscle relaxants, Subject name: Anaesthesia
[{'content': 'Laudanosine is metabolite of - \nSelect and explain. \nA. Cisatracurium, B. Atracurium, C. Pancuronium, D. Gallamine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Laudanosine is the teiary metabolite produced during Hoffman's degradation of Atracurium . Laudanosine crosses blood brain barrier and produces convulsions.", 'role': 'assistant'}]