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
All are true about glutathione except? 
Select and explain. 
A. It is a tripeptide, B. It converts hemoglobin to methemoglobin, C. It conjugates xenobiotics, D. It scavenges free radicals and superoxide ions
B: It converts hemoglobin to methemoglobin
Answer: B: It converts hemoglobin to methemoglobin 
Explanation: None