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': 'Succinyl Co-A is formed by: \nSelect and explain. \nA. Histidine, B. Leucine, C. Valine, D. Lysine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Succinyl COA is formed by Valine, Isoleucine, Methionine.', 'role': 'assistant'}]