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 following substances inhibit succinate dehydrogease in Kreb cycle? 
Select and explain. 
A. Flouroacetate, B. Arsenite, C. Malonate, D. Fluoride
C: Malonate
Answer: C: Malonate 
Explanation: Inhibitors of TCA Cycle

Aconitase noncompetitively inhibited by Flouroacetate 
Alpha Ketoglutarate Dehydrogenase noncompetitively inhibited by Arsenite 
Succinate Dehydrogenase is competitively inhibited by Malonate.(Inhibitor of complex II of ETC).

Harper 30th edition pg-162