Answer:
Polysome.
Step-by-step explanation:
RNA is present as the genetic material in some viruses only. The RNA molecule is formed from the template DNA molecule by the process of transcription.
A single mRNA can form the multiple copies of the poly[peptide chain, known as poly ribosomes or polysome. Polysomes are mainly found in the case of prokaryotes.
Thus, the correct answer is option (4).