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 is not a rate limiting enzyme of TCA cycle? 
Select and explain. 
A. Citrate synthase, B. Alpha ketoglutarate dehydrogenase, C. Isocitrate dehydrogenase, D. Succinate dehydrogenase
D: Succinate dehydrogenase
Answer: D: Succinate dehydrogenase 
Explanation: Option a,b,c are the rate limiting enzymes of TCA cycle.