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 false about glutathione 
Select and explain. 
A. It decrease free radicals, reduces oxidative stress, B. Helps in conjugation reactions, C. Cofactor of enzymes, D. Converts hemoglobin to methemoglobin
D: Converts hemoglobin to methemoglobin
Answer: D: Converts hemoglobin to methemoglobin 
Explanation: Glutatione suppress the formation of methemoglobin.
Rest others are functions of glutathione.
It is a important intracellular reducing substance.