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: Dental
[{'content': 'Which aminoacid is absent in Carisolv \nSelect and explain. \nA. Glycine, B. Glutamic acid, C. Leucine, D. Lysine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]