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': 'Chronic renal failure with inappropriately high haemoglobin levels may be seen with - \nSelect and explain. \nA. Hypertensive nephropathy, B. Ischaemic nephropathy, C. Diabetic nephropathy, D. Polycystic renal disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]