In AIDS virus, there is

DNA + Protein
RNA + DNA
RNA + Protein
DNA only

The correct answer is (c). AIDS virus is a retrovirus, which means that it contains RNA as its genetic material. The virus uses an enzyme called reverse transcriptase to convert its RNA into DNA, which is then integrated into the DNA of the host cell. This integration allows the virus to replicate and produce new viruses.

Option (a) is incorrect because AIDS virus does not contain DNA. Option (b) is incorrect because AIDS virus does not contain both RNA and DNA. Option (d) is incorrect because AIDS virus does not contain only DNA.