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
[{'content': 'Malignant hypehermia is due to: \nSelect and explain. \nA. Nicotinic receptors, B. Ryanodine receptors, C. Muscarinic receptors, D. Serotogenic receptors', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ryanodine receptors', 'role': 'assistant'}]