This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
[{'content': 'Which of the following drug prevent these renal stones? \nSelect and explain. \nA. Acetazolamide, B. Hydrochlohiazide, C. Mannitol, D. Furosemide', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The renal stones are hexagonal in shape so, cystine stonesCarbonic anhydrase inhibitors are useful for cystinuria.Ref: Goodman Gillman 12th ed. Pg: 680', 'role': 'assistant'}]