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
True about Glutathione reductase: 
Select and explain. 
A. Sulphur containing enzyme, B. Impoant in methemoglobinemia, C. Free radical scavenger, D. All
C: Free radical scavenger
Answer: C: Free radical scavenger 
Explanation: C i.e. Free radical scavanger