This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins and Amino Acids, Subject name: Biochemistry
All of the following amino acids forms Acetyl CoA via pyruvate dehydrogenase except: 
Select and explain. 
A. Glycine, B. Tyrosine, C. Hydroxyproline, D. Alanine
B: Tyrosine
Answer: B: Tyrosine 
Explanation: Ans. B. Tyrosine(Ref: Harper 31/e page 151-155)Amino acid that enter via Pyruvate to TCA cycle are:Hydroxy Proline, Serine, Cysteine, Threonine, GlycineTryptophan, Alanine