This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Translation, Subject name: Biochemistry
Which of the following amino acid does not show degeneracy ? 
Select and explain. 
A. Serine, B. Valine, C. Alanine, D. Methionine
D: Methionine
Answer: D: Methionine 
Explanation: Degeneracy or redundancy Propey of codon that each amino acid has more than one codon. Two amino acids do not show degeneracy i.e , Methionine Tryptophan. (They have only one codon.)