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 of the following amino acids forms acetyl CoA Pyruvate Dehydrogenase EXCEPT \nSelect and explain. \nA. Glycine, B. Hydroxyproline, C. Tyrosine, D. Alanine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Six amino acids form pyruvate during catabolism. They are Glycine, Alanine, Serine, Threonine, Cysteine and Hydroxy-Proline (see fig).', 'role': 'assistant'}]