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': 'Of the various modalities used in the treatment of re-threatening effects of hyperkalemia which one of the following as the most rapid onset of action ? \nSelect and explain. \nA. Hemodialysis, B. Sodium bicarbonate infusion, C. Insulin and glucose infusion, D. Intravenous calcium gluconate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]