This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
Drug of choice for treatment of malignant hyperthermia - 
Select and explain. 
A. Dantrolene sodium, B. Potassium chloride, C. Atropine, D. Corticosteroids
A: Dantrolene sodium
Answer: A: Dantrolene sodium 
Explanation: Ans. is 'a' i.e., Dantrolene sodium o I. V dantroline is the DOC, it acts by preventing the release of calcium from sarcoplasmic reticulumo Others are for supportive treatment - oxygen, cooling, and insulin & dextrose are given for hyperkalemia due to potassium release from contracted muscle.