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: Which of the following layers must pass through the sperm to reach the egg during fertilization? 
 Options:  <1> Endometrial zone <2> Pellucid zone. <3> Striated area. <4> Sticky zone <5> Myometrial zone.
