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
All the following cause malignant hyperpyrexia except – 
Select and explain. 
A. N2O, B. Halothane, C. Methyoxyflurane, D. Isoflurane
A: N2O
Answer: A: N2O 
Explanation: None