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
Same aminoacid is coded by multiple codons d/t following : 
Select and explain. 
A. Degeneracy, B. Frame-shift mutation, C. Transcription, D. Mutation
A: Degeneracy
Answer: A: Degeneracy 
Explanation: A i.e. Degeneracy