This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Of the following groups of amino acids produce common component of the TCA cycle is \nSelect and explain. \nA. Alanine, isoleucine, leucine, lysine, B. Serine, asparagine, glycine, glutamate, C. Isoleucine, valine, methionine, D. Proline, leucine, tryptophan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Isoleucine, valine, methionine', 'role': 'assistant'}]