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
Malonate competetively inhibits 
Select and explain. 
A. Fumarate dehydrogenase, B. Succinate thiokinase, C. Aconitase, D. Succinate dehydrogenase
D: Succinate dehydrogenase
Answer: D: Succinate dehydrogenase 
Explanation: Succinate dehydrogenase