This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory chain, Subject name: Biochemistry
[{'content': 'Which of the following enters the TCA cycle at succinyl - CoA? \nSelect and explain. \nA. Tyrosine, B. Methionine, C. Tryptophan, D. Histidine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Valine Isoleucine Methionine conves to Propionyl CoA & then conves to Succinyl CoA & enters the cycle.Ref: DM Vasudevan Textbook of Medical Biochemistry, 6th edition, page no: 221', 'role': 'assistant'}]