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
Which of the following is selenium containing enzyme? 
Select and explain. 
A. Xanthine oxidase, B. Glutathione peroxidase, C. Superoxide dismutase, D. Lysyl oxidase
B: Glutathione peroxidase
Answer: B: Glutathione peroxidase 
Explanation: Other examples of Selenium containing enzymes are:(Selenocysteine is a part of these enzymes)

Thioredoxin reductase
Deiodinase
Glutathione peroxidase