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
Which of the following muscle relaxants is free of cardiovascular effects over the entire clinical dose range 
Select and explain. 
A. Pancuronimum, B. Vecuronium, C. Atracurium, D. Pipecuronium
B: Vecuronium
Answer: B: Vecuronium 
Explanation: For vecuronium associated side effects are rare, cardiac effects are very minimal.occasional branchospasm is repoed due to histamine release.