This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
[{'content': 'Selenium is a co-factor for \nSelect and explain. \nA. Glutathione peroxidase, B. Glutathione reductase, C. Glutathione synthetase, D. Glutathione dehydrogenase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Selenium is component of selenocysteine, glutathione peroxidase, thioredoxin, deiodinaseThe peroxides that are formed by radical damage to lipids in membranes and plasma lipoproteins are reduced to hydroxy fatty acids by glutathione peroxidase.Ref: Harper&;s Biochemistry; 30th edition; Pg: 567', 'role': 'assistant'}]