Which of the following factor is required for the protein synthesis? (i) Initiation codon (ii) GTP and ATP (iii) Peptidyl transferase (iv) tRNA (v) mRNA (vi) Amino acid activating enzyme (vii) rRNA Choose the correct combination.

• A. (i), (ii) and (iii)
• B.                    (iii), (iv) and (v)
• C. (v), (vi) and (vii)                        
• D. All of these