The correct option is D anticodon
tRNAs (transfer RNAs) carry amino acids to the ribosome. They act as "bridges," matching a codon in an mRNA with the amino acid it codes for.
Each tRNA contains a set of three nucleotides called an anticodon. The anticodon of a given tRNA can bind to the complimentary codon on the mRNA. The tRNA molecule also carries an amino acid: specifically, the one encoded by the codon to which the anticodon will bind to.