Avirus
contains rna and dna in a protein coat
is surrounded by a nucleic acid envelope
contains rna or dna in a protein coat
consists of a protein surrounded by a nucleic acid coat

The correct option is C. A virus contains RNA or DNA in a protein coat.

Explanation:

Viruses can be described as tiny particles which are able to incorporate their genetic material into a host. Many viruses can be destructive to the host cells.

The structure of a virus includes DNA or RNA which is enclosed in a structure known as an envelope or capsid. The envelope or capsid is made up of proteins. Some viruses also have a tail.

The capsid of a virus usually remains outside the host cell and it injects its viral genome into the host cell. The DNA or RNA o the virus then incorporates in the host cell.

c genetic engineering

i am positive it is c. condensing but i may be wrong