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: After gastrulation, the epiblast is transformed into: 
 Options:  <1> Endoderm <2> Mesoderm <3> Ectoderm <4> Celoma <5> Chorionic villi.
