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': 'Which of the following is not a phase I reaction - \nSelect and explain. \nA. Oxidation, B. Reduction, C. Hydrolysis, D. Conjugation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Phase I reactions → \xa0Oxidation (including hydroxylation), reduction, hydrolysis, cyclization and decyclization.\nPhase II reactions → Conjugation reaction (glucuronidation, sulfation, acetylation, methylation, conjugation with glutathione, aminoacid conjugation).', 'role': 'assistant'}]