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 metabolite of- \nSelect and explain. \nA. Cisatracurium, B. Atracurium, C. Pancuronium, D. Gallamine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Atracurium besilate, also known as atracurium besylate, is a medication used in addition to other medications to provide skeletal muscle relaxation during surgery or mechanical ventilation', 'role': 'assistant'}]