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 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: Alanine is a non-essential amino acid .essential amino acids are threonine valine tryptophan isoleucine lysine proline methionine (TV TILL 8 PM).they are not synthesized by humans.they are required for our normal growth.Ref: DM Vasudevan - Textbook of Biochemistry for Medical Students, 7th edition, page no: 27', 'role': 'assistant'}]