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
Which of the following inhibitor in TCA cycle acts by blocking citrate 
Select and explain. 
A. Fluroacetate, B. Arsenite, C. Malonate, D. None of the above
A: Fluroacetate
Answer: A: Fluroacetate 
Explanation: Fluoroacetate inhibits aconitase and thereby blocks citrate to be converted into Cis-aconitate.