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': 'Which of the following is not a phase I reaction \nSelect and explain. \nA. Oxidation, B. Deamination, C. Dealkylation, D. Sulfation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sulfation is a phase II metabolic reaction where a conjugate group is attached to the drug, whereas phase I reactions are oxido -reductive reactions.', 'role': 'assistant'}]