This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluids and Electrolyte Imbalance, Subject name: Medicine
[{'content': 'Hyperphosphatemia is treated by? \nSelect and explain. \nA. Calcitonin, B. Sevelamer, C. Magnesium hydroxide, D. Diuretics', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sevelmer is a phosphate binder; decrease serum phosphate concentration without changing calcium, aluminium, or bicarbonate concentration', 'role': 'assistant'}]