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: Social & Preventive Medicine
[{'content': 'Which of the following amino acids is absent in human milk? \nSelect and explain. \nA. Glycine, B. Threonine, C. Lysine, D. Leucine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Among the amino acids, glutamic acid is maximum and glycine is absent in human milk. Ref: Nutrition and Child Development, K.E. Elizabeth, 4th edition pg: 17', 'role': 'assistant'}]