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: Social & Preventive Medicine
[{'content': 'Which of the following trace element has vitamin E like action: \nSelect and explain. \nA. Selenium, B. Cheomycin, C. Copper, D. Zinc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Selenium', 'role': 'assistant'}]