This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Classification and metabolism of amino acids, Subject name: Biochemistry
[{'content': 'All are aromatic amino acid except \nSelect and explain. \nA. Phenyl alanine, B. Tyrosine, C. Leucine, D. Histidine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Branched chain Amino Acids are Valine Leucine Isoleucine All branched chain amino acids are essential Aromatic Amino Acids are Phenylalanine - Essential Tyrosine - Non-essential Tryptophan - Essential Histidine - Semi-essential', 'role': 'assistant'}]