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': 'In metabolism of xenobiotics, all of the following reactions occur in phase one EXCEPT ? \nSelect and explain. \nA. Oxidation, B. Reduction, C. Conjugation, D. Hydrolysis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]