This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuromuscular Blocker, Subject name: Anaesthesia
Which of the following neuromuscular blocker is most cardiostable- 
Select and explain. 
A. Vecuronium, B. d-tubocurare, C. Atracurium, D. Pancuronium
A: Vecuronium
Answer: A: Vecuronium 
Explanation: Benzylisoquinoline group causes histamine release so associated with hypotension and tachycardia. Aminosteroid group - no histamine release in aminosteroid group only pancuronium causes vagal blockade - Hypeension and Tachycardia.