This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': 'N Acetyl Cysteine replenishes: \nSelect and explain. \nA. Glutathione, B. Glycine, C. Glutamate, D. GABA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. GlutathioneThe active part of both Glutathione and N Acetyl Cysteine is Sulfhydryl group of Cysteine. So N Acetyl Cysteine replenishes Glutathione.', 'role': 'assistant'}]