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': "Isosthenuria is seen in \nSelect and explain. \nA. Chronic renal failure, B. Diabetes insipidus, C. Congestive cardiac failure, D. Weil's disease", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Causes :\nChronic renal failure.\nAdministration of furosomide.\nHypercalcemia.', 'role': 'assistant'}]