This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
All are aromatic amino acids except 
Select and explain. 
A. Lysine, B. Phenylalanine, C. Tyrosine, D. Tryptophan
A: Lysine
Answer: A: Lysine 
Explanation: Aromatic amino acids are Phenylalanine and Tyrosine.Lysine is a Dibasic monocarboxylic amino acid.Ref: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 24