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
Intermediate metabolite in TCA cycle are A/E: 
Select and explain. 
A. Pvruvate, B. Malonate, C. Nitric oxide, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: All of the above