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': 'Reaction occuring in conversion of norepinephrine to epinephrine? \nSelect and explain. \nA. Hydroxylation, B. Oxidation, C. Glucuronidation, D. Methylation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Methylation', 'role': 'assistant'}]