This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NSAIDs, Gout and Rheumatoid Ahritis, Subject name: Pharmacology
[{'content': 'Which of following anti-gout drugs act by inhibiting the enzyme xanthine oxidase? \nSelect and explain. \nA. Probenecid, B. Rasburicase, C. Allopurinol, D. Sulfinpyrazone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: DRUGS USED IN CHRONIC GOUT Group Mechanism Drugs Uric acid synthesis inhibitors Xanthine oxidase inhibitors Allopurinol, Febuxostat Uricosuric agents URAT-1 transpoer inhibitors Probenecid, Sulfinpyrazone, Benzbromarone, Lesinurad Recombinant uricase Cause oxidation of urate to allantoin Rasburicase, Pegloticase', 'role': 'assistant'}]