What is the job of a ribosome?

The job of the ribosome is to provide a platform for the synthesis of protein.

In order words, the ribosome is a cell organelle that functions as a site for protein synthesis.

Genetic information that has been transcribed as mRNA moves from the nucleus to the cytoplasm and gets bounded to the ribosome. The information then gets translated into protein through the collaboration of the tRNA and the two sub-units of the ribosome.

More on the ribosome can be found here: link

Ribosomes have two main functions — decoding the message and the formation of peptide bonds. These two activities reside in two large ribonucleoprotein particles (RNPs) of unequal size, the ribosomal subunits. Each subunit is made of one or more ribosomal RNAs (rRNAs) and many ribosomal proteins (r-proteins).

the correct option is option d