Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: In the Pap test, cytological samples should be collected from:
Options: <1> The vulva, the cervix and the inside of the uterine cavity. <2> The vaginal walls and the uterine fundus. <3> The inside of the cervix, the external cervical os and the posterior vaginal sac. <4> The vaginal introitus and the ectocervix. <5> The endocervix and the lateral vaginal sacs.
Output:
3