This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cofactor and prosthetic groups, Subject name: Biochemistry
[{'content': 'All of the following are true about Xanthine oxidase, EXCEPT: \nSelect and explain. \nA. Contains iron, B. Contains molybdenum, C. Flavoprotein, D. Produces H2O', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Xanthine oxidase is a flavoprotein containing both molybdenum and iron-sulphur clusters. Deficiency of xanthine oxidase leads to hyperuricemia. Look at the reaction. Xanthine oxidase produces H2O2(Hydrogen peroxide), not H2O.', 'role': 'assistant'}]