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': 'Which of the following muscle relaxants is free of cardiovascular effects over the entire clinical dose range \nSelect and explain. \nA. Pancuronimum, B. Vecuronium, C. Atracurium, D. Pipecuronium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: For vecuronium associated side effects are rare, cardiac effects are very minimal.occasional branchospasm is repoed due to histamine release.', 'role': 'assistant'}]