The technical term used for virus is

✅Explanation:A virion is the complete, infectious particle of a virus. It consists of the viral genetic material (DNA or RNA) enclosed within a protein coat called a capsid.
📌Other Options Explanations:• Option B: Virusoid is a type of subviral agent that requires a helper virus for replication.• Option C: Viroid is a small, circular RNA molecule that can infect plants.

🔑Key Points:• Virion is the complete infectious virus particle that can exist outside the host cell.• It consists of:
-Capsid – It is the outer protein layer made up of smaller subunits called capsomeres.
-Core – It is the inner part containing the nucleic acid (DNA or RNA).• Hence, the virion is also known as 'nucleocapsid'.• The main function of the capsid is to protect the viral genome.• It also helps in attaching the virion to specific receptors on the host cell during infection.• The functional unit of the virus outside the host cell is Virion.• Virions are the complete viral particles that are capable of inducing the infection.• These are smaller than the virus and are generally spheroidal or rod-shaped.• It consists of an outer protein shell called a capsid and an inner core of nucleic acid (either ribonucleic or deoxyribonucleic acid—RNA or DNA).• They have an extracellular structure.