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: The trophoblast develops from: 
 Options:  <1> The outer layer of the blastocyst. <2> The internal cell mass. <3> The zona pellucida. <4> The bilaminar germinative disc. <5> The endometrium
