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': 'Role of selenocystein is impoant in ? \nSelect and explain. \nA. Hydroxylation of dopamine, B. Oxidation of drugs, C. Antioxidant mechanism, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Antioxidant mechanism", 'role': 'assistant'}]