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': 'Glutathione is protein which contain how many amino acids: \nSelect and explain. \nA. 2, B. 3, C. 4, D. 5', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Glutathione is\xa0gamma glutamyl cysteinyl glycine\xa0(contain 3 amino acid derivatives)', 'role': 'assistant'}]