Answer:
The correct answer would be tRNA.
tRNA (transfer ribonucleic acid) is a type of RNA which brings amino acid to a ribosomal site which is then added to the growing polypeptide chain.
The charged tRNA which has a complementary anti-codon site to the codon of mRNA brings the specific amino acid to the A site of the ribosomal complex.
The amino acid is then added to the growing chain and uncharged tRNA exit the complex from E site.