The term D-RNA is not recognized as a standard class of RNA in molecular biology. It may be confused with defective interfering RNA (DI-RNA), which are subgenomic viral RNA fragments that can interfere with the replication of viruses like coronaviruses. These DI-RNAs are not functional RNAs produced by the host but are viral elements that arise during high multiplicity infections and are involved in viral replication and packaging .

In contrast, the other options are well-established types of RNA:

mRNA (messenger RNA): Serves as a template for protein synthesis by carrying genetic information from DNA to ribosomes.

tRNA (transfer RNA): Translates the mRNA codons into the corresponding amino acids during protein synthesis.

rRNA (ribosomal RNA): Combines with proteins to form ribosomes, the sites of protein synthesis in cells.

These three types of RNA are essential for the process of translation and protein synthesis in all living organisms.

More Info: en.wikipedia.org