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': 'Glutathione peroxidase contains: \nSelect and explain. \nA. Chromium, B. Manganese, C. Zinc, D. Selenium', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Selenium', 'role': 'assistant'}]