This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
[{'content': 'Best drug for chronic gout in patient with renal impairment is: \nSelect and explain. \nA. Naproxen, B. Probenecid, C. Allopurinol, D. Sulfinpyrazone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (C) Allopurinol(Ref: KDT 8th/e p217)*NSAIDs like naproxen have no role in chronic gout*Uricosuric drugs like probenecid and sulfinpyrazone are ineffective in the presence of renal insufficiency*Allopurinol is drug of choice for most cases of chronic gout.', 'role': 'assistant'}]