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': 'Nephrocalcinosis is seen in \nSelect and explain. \nA. Medullary sponge disease, B. Acute pyelonephritis, C. Acute glomerulonephritis, D. Chronic pyelonephritis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Medullary sponge kidney) Medullary sponge kidney and Hyperparathyroidism are established causes ofNephrocaleinosis.', 'role': 'assistant'}]