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
Chronic renal failure with inappropriately high haemoglobin levels may be seen with - 
Select and explain. 
A. Hypertensive nephropathy, B. Ischaemic nephropathy, C. Diabetic nephropathy, D. Polycystic renal disease
D: Polycystic renal disease
Answer: D: Polycystic renal disease 
Explanation: None