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'.
Input: Question: The genome of the hepatitis B virus is DNA from:
Options: <1> Simple string (+). <2> Simple string (-). <3> Double circular chain. <4> Double linear chain. <5> Incomplete circular double chain (with notches).
Output:
5