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 collagen, what is the amino acid that is repeated every three residues? 
 Options:  <1> Glycine <2> To the girl. <3> Proline <4> Lysine <5> Hydroxyproline
