The HIV virion is best described as a segmented RNA genome in an icosahedral capsid, without an envelope. Thus, option "D" is correct.
Genetic material can be linear or circular. It is linear and single-stranded in viruses such as rabies, smallpox, retroviruses etc.
For example Rabies virus has enveloped the helical capsid. Retrovirus though have a linear RNA but possess a hexagonal capsid with 12 pentamers enclosed with in a shell. Genome structure in influenza virus is segmented and herpes virus is a DNA virus.
Thus, option "D" is correct.
To learn more about Genetic material click here:
https://brainly.com/question/14530382
#SPJ1