This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Amino Acid Metabolism, Subject name: Biochemistry
Oxaloacetate is formed from? 
Select and explain. 
A. Proline, B. Glutamate, C. Aspartate, D. Lysine
C: Aspartate
Answer: C: Aspartate 
Explanation: Ans. (c) Aspartate