This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
[{'content': 'All of the following are essential amino acids except: \nSelect and explain. \nA. Methionine, B. Lysine, C. Alanine, D. Leucine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. AlanineEssential (MettVilPhlyRead As Met Will Fly)All the other amino acidNonessentialMethionineArginineAll the other amino acidThreonine Tryptophan Valine Isoleucine Leucine Phenylalanine Lysine', 'role': 'assistant'}]