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
All of the following amino acids are conveed to succinyl-CoA, EXCEPT: 
Select and explain. 
A. Methionine, B. Isoleucine, C. Valine, D. Histidine
D: Histidine
Answer: D: Histidine 
Explanation: Histidine, Arginine, Proline and Glutamine are aminoacids that form alpha ketoglutarate. Methionine, Valine, Isoleucine and Threonine are aminoacids that form Succinyl-CoA. Ref: Lippincott's Illustrated Reviews: Biochemistry, 3rd Edition, Chapter 20, Pages 260-61