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 humans, Lactobacillus acidophilus is part of the normal microbiota of: 
 Options:  <1> The female genital tract <2> The bucco-pharynx. <3> The urinary tract <4> The skin. <5> The respiratory tract
