This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
[{'content': 'Cis-Atracurium is preferred over Atracurium because \nSelect and explain. \nA. It has rapid onset of action, B. It causes realse of histamine, C. It has sho duration of action, D. It has less depressant action on hea', 'role': 'user'}, {'content': "Answer: B \nExplanation: Refer Miller's 7/e p 869 Both Atracurium and cis-Atracurium are non-depolarizing neuromuscular blockers Both of these are intermediate acting agents Both of these agents are cardiostable", 'role': 'assistant'}]