Instructions: 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: According to Berman et al., From the sanitary point of view, to the basic social group constituted by persons of feminine or masculine gender, young or adult, united by legal, friendship, related or not genetically and that others consider close friends, he calls you:
Options: <1> Collective. <2> Informal system <3> Control group. <4> Citizenship. <5> Family.
Output:
5