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': 'Which of the following inhibitor in TCA cycle acts by blocking citrate \nSelect and explain. \nA. Fluroacetate, B. Arsenite, C. Malonate, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Fluoroacetate inhibits aconitase and thereby blocks citrate to be converted into Cis-aconitate.', 'role': 'assistant'}]