This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
Which one of the following can be conveed to an intermediate of either the citric acid cycle or the urea cycle? 
Select and explain. 
A. Tyrosine, B. Lysine, C. Leucine, D. Aspaate
D: Aspaate
Answer: D: Aspaate 
Explanation: .