Final answer:
Types 6 and 11 are the two human papillomaviruses most responsible for condyloma acuminata, or genital warts.
Step-by-step explanation:
The two human papillomaviruses most responsible for condyloma acuminata, also known as genital warts, are types 6 and 11. These strains of HPV are considered low-risk and are not associated with an increased risk of cancer. Genital warts are typically transmitted through sexual contact and can appear on the external genitalia or anus.