This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
Cause of malignant hypehermia is? 
Select and explain. 
A. Halothane, B. Isoflurane, C. Thiopentone, D. Suxamethonium
D: Suxamethonium
Answer: D: Suxamethonium 
Explanation: Ans. is 'd > b' i.e., Suxamethonium > Isoflurane Drugs causing Malignant hvpehermia (MH) Succinylcholine Enflurane Methoxyflurane Phenothiazines Halothane Sevoflurane MAO inhibitors Lignocaine Isoflurane Desflurane TCA Succinylcholine is the most common cause of MH. Amongst anaesthetics, halothane is most common cause. Combination of Sch and Halothane has a much higher incidence.