This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': 'Restless leg syndrome (RLS) is seen in: \nSelect and explain. \nA. Hypercalcemia, B. Hyperphosphatemia, C. Chronic renal failure, D. Hyperkalemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Chronic renal failureNeuromuscular features of CRF:a. Encephalopathyb. Restless leg syndromec. Peripheral neuropathyd. Impotencye. Dialysis dementiaCNS features in CRF are due toa. Increase BUNb. Increase Creatininec. Decrease Nad. Acidosise. Hyperosmolarityf. Middle molecules', 'role': 'assistant'}]