The correct answer is A. HHV-8. 

Kaposi Sarcoma associated with AIDS is caused by Human Herpesvirus 8. It can present as erythematous-purple papules and plaques.

KS is not caused by the other HHV types.

References:

Schwartz RA, Micali G, Nasca MR, Scuderi L. Kaposi sarcoma: a continuing conundrum.J Am Acad Dermatol. 2008 Aug;59(2):179-206; quiz 207-8. doi: 10.1016/j.jaad.2008.05.001. Review.

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