Answer: Option C
:
C
Of the 64 existing codons, UAA, UAG and UGA act as stop codons or termination codons, as they do not code for any amino acid. Their role is to act as stop signals for protein synthesis. Since they do not code for any amino acid, they obviously, do not have corresponding tRNA molecules that have the respective anticodons or carry the amino acids. Thus, the corresponding anticodons do not exist.