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': 'True about Glutathione reductase: \nSelect and explain. \nA. Sulphur containing enzyme, B. Impoant in methemoglobinemia, C. Free radical scavenger, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Free radical scavanger', 'role': 'assistant'}]