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: Pharmacology
[{'content': 'Nonsynthetic phase I reaction for drug detoxification is:. \nSelect and explain. \nA. Glucuronidation, B. Acetylation, C. Methylation, D. Oxidation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]