21. Which is correct order of following steps in translation elongation? (1) EF-G, with GTP, translocates peptidyl-tRNA to the P site. (2) EF-Tu, with GTP, binds an aminoacyl-tRNA to the ribosomal A site. (3) Peptidyl transferase forms a peptide bond between the peptide in the P site and the newly arrived aminoacyl-tRNA in the A site. (A) 3, 1, 2; (B) 3, 2, 1; (C) 1, 2, 3; (D) 1, 3, 2; (E) 2, 3, 1.