Final answer:
The correct answer is B. They contain a capsid.
Step-by-step explanation:
The correct answer is B. They contain a capsid.
Capsids are protein coats that protect the genetic material of viruses. A pre-capsulated form would refer to a form of the virus that already has a capsid, ready for infection. Therefore, if something is not available in a pre-capsulated form, it means it does not have a capsid.
Options C and D are not the correct answers because they do not address the presence of a capsid. Option C refers to a rogue form of protein called PrP, which is associated with prion diseases. Option D refers to the ability of something to be inactivated by an autoclave. While some viruses can be inactivated by an autoclave, this does not determine whether they have a capsid or not.