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
A 28-year-old man came for shoulder surgery. The patient had a documented episode of malignant hypehermia in a previous surgery under general anesthesia. Which of the following neuromuscular blockers is contraindicated in this patient 
Select and explain. 
A. Succinylcholine, B. Pancuronium, C. Rocuronium, D. Vecuronium
A: Succinylcholine
Answer: A: Succinylcholine 
Explanation: Malignant hypehermia is a life-threatening hypermetabolic dis order that is triggered by succinylcholine and the volatile inhaled anesthetics (isoflurane, desflurane, and sevoflurane). All triggering agents are contraindicated in patients with a history of malignant hypehermia.