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: Pharmacology
[{'content': 'Which of the following diuretics keeps urine "isotonic"? \nSelect and explain. \nA. Thiazide diuretics, B. Loop diuretics, C. Carbonic anhydrase inhibitors, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Loop diuretics decreases both positive and negative water clearance and keeps urine isotonic.', 'role': 'assistant'}]