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: Biochemistry
[{'content': 'Cofactor for dopamine hydroxylase ? \nSelect and explain. \nA. Fe, B. Mg, C. Mn, D. Cu', 'role': 'user'}, {'content': "Answer: D \nExplanation: Dopamine 8-hydroxylase is a 'copper' containing monooxygenase that requires ascorbic acid and molecular oxygen.It catalyzes the formation of norepinephrine.", 'role': 'assistant'}]