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': 'A girl aged 8 years has been admitted for dialysis. She has serum K of 7.5 meq/1, which is the fastest way to reduce the hyperkalemia? \nSelect and explain. \nA. Kayexalate enema, B. Infusion of insulin + glucose, C. IV calcium gluconate, D. IV NaHCO3', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is B (Infusion of insulin and glucose): 'Intravenous insulin is the fastest way to lower serum potassium levels' Reduce serum levels by shifting Remove excess potassium from the body K+ from extracellular to intracellular fluid", 'role': 'assistant'}]