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
Both ketogenic and glucogenic amino acids as 
Select and explain. 
A. Isoleucine, B. Leucine, C. Arginine, D. Glycine
A: Isoleucine
Answer: A: Isoleucine 
Explanation: None