Final answer:
a) Squamous epithelial cells. In a HPV infection, the viral DNA replicates in squamous epithelial cells.
Step-by-step explanation:
The viral DNA in a HPV infection replicates in squamous epithelial cells. Human papillomavirus (HPV) is a sexually transmitted infection that enters body cells and takes over the host cell's metabolic machinery to produce more virus particles. In the case of a HPV infection, the infected squamous epithelial cells of the cervix become larger and some may have two nuclei instead of one.