Detailed Instructions: 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'.
Problem:Question: The three-dimensional arrangement of a protein corresponds to:
Options: <1> Its primary structure <2> Its secondary structure. <3> Its tertiary structure. <4> Its quaternary structure. <5> With its primary, secondary, tertiary and quaternary structure.
Solution:
3