The component that is not found in a HIV virion are the two strands that make up the DNA genome, as HIV has its genetic material as RNA. Moreover, it is a retrovirus, which means it has a reverse transcriptase enzyme to make DNA from RNA, and integrase and protease enzymes that play a role in getting the viral DNA into the infected cell genome; as well as other proteins such as the gp120.
The correct answer is A.