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': 'The uricosuric agent used for acute gout in a chronic renal failure patient is: \nSelect and explain. \nA. Probenecid, B. Colchicine, C. Benzbromarone, D. Aspirin', 'role': 'user'}, {'content': "Answer: C \nExplanation: Uricosuric agents such as probenecid can be used in patients with good renal function who underexcrete uric acid. Probenecid is generally not effective in patients with serum creatinine levels >177 mol/L (2 mg/dL). These patients may require allopurinol or benzbromarone. Benzbromarone is another uricosuric drug that is more effective in patients with renal failure. Ref: Schumacher H.R., Chen L.X. (2012). Chapter 333. Gout and Other Crystal-Associated Ahropathies. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo (Eds), Harrison's Principles of Internal Medicine, 18e.", 'role': 'assistant'}]