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: Medicine
[{'content': 'The treatment of choice in acute hyperkalemia of life threatening to cardiac myocytes is \nSelect and explain. \nA. Infusion of calcium gluconate, B. Oral resins, C. Intravenous infusion of insulin, D. b blocker', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is `a' i.e. Infusion of calcium gluconate", 'role': 'assistant'}]