43. Which linkage best describes the covalent bond between an amino acid (AA) and its tRNA?
(A)Amino group of AA linked to 5' -OH of tRNA.
(B)A mino group of AA linked to 5' phosphate of tRNA.
(C)Carboxyl group of AA linked to 3' -OH of tRNA.
(D)Carboxyl group of AA linked to 3' phosphate of tRNA.