This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthesia, Subject name: Pharmacology
[{'content': 'Mechanism of action of dantroline is? \nSelect and explain. \nA. Inhibits Ca++ secretion from sarcoplasm, B. Binds to ryanodine receptors to block release of Ca++, C. Inhibits GABA, D. Inhibits Gamma motor neuron', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Binds to ryanodine receptors to block release of Ca++Ref: Lippincott 5thed 344', 'role': 'assistant'}]