This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
[{'content': 'All are aromatic amino acids except \nSelect and explain. \nA. Lysine, B. Phenylalanine, C. Tyrosine, D. Tryptophan', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Aromatic amino acids are Phenylalanine and Tyrosine.Lysine is a Dibasic monocarboxylic amino acid.Ref: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 24', 'role': 'assistant'}]