This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Polycystic Kidneys, Subject name: Medicine
[{'content': 'Which is the most common symptom of medullary sponge kidney disease? \nSelect and explain. \nA. Anuria, B. Anemia, C. Azotemia, D. UTI', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Patients with this condition typically maintain normal renal function through adulthood Complications include nephrolithiasis, pyelonephritis, hyposthenuria (inability to concentrate urine), and distal A.', 'role': 'assistant'}]