Ans. A.Gardasil 9Gardasil 9 is an HPV vaccine approved by the U.S. Food and Drug Administration and can be used for both girls and boys.This vaccine can prevent most cases of cervical cancer if given before a girl or woman is exposed to the virus.HPV Vaccines* Cervarix - Protects against HPV-16, 18.* Gardasil 4 Protects against HPV - 6, 11, 16, 18.* Gardasil -9 - Protects against HPV - 6, 11, 16, 18, 31, 33, 45, 52, 58.