This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: TCA Cycle, Subject name: Biochemistry
Which of the following is the FAD-linked dehydrogenase of TCA cycle? 
Select and explain. 
A. Isocitrate dehydrogenase, B. Malate dehydrogenase, C. Succinate dehydrogenase, D. a ketoglutarate dehydrogenase
C: Succinate dehydrogenase
Answer: C: Succinate dehydrogenase 
Explanation: Ans. c)Succinate dehydrogenase is the only 1 FAD-linked dehydrogenase in TCA cycle