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
The citric acid cycle is the final pathway for oxidation of 
Select and explain. 
A. Enzymes, B. Vitamins, C. Minerals, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: None