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: Medicine
[{'content': 'All of the following conditions are observed in Gout.except - \nSelect and explain. \nA. Uric acid nephrolithiasis, B. Deficiency of enzyme xanthine oxidase, C. Increase is serum urate concentration, D. Renal disease involving interstitial tissues', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]