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
The mineral having action like vitamin E ? 
Select and explain. 
A. Calcium, B. Iron, C. Selenium, D. Magnesium
C: Selenium
Answer: C: Selenium 
Explanation: Ans. is 'c' i.e., Selenium Selenium functions as an antioxidant along with vitamin E.Selenium is a constituent of glutathione peroxidase, an antioxidant enzyme which prevents against oxidative damage.Selenium also is a constituent of iodothyronine deiodinase, the enzyme that conves thyroxine triiodothyronine.