The correct answer is option D, that is, a protein.
The process whereby the biological cells produce new cells is called protein synthesis. It is balanced by the loss of cellular proteins through export or degradation. The formation of a protein is also known as translation.
Translation refers to the arrangement of amino acids by ribosomes, which is an important part of the biosynthetic pathway, along with the production of aminoacylation of transfer RNA, generation of mRNA, co-translational transport, and post-translational modification.