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'.

Example Input: Question: Which of the following hepatitis viruses is a subsidiary of treatment with viral protease inhibitors? 
 Options:  <1> The hepatitis C virus <2> The hepatitis B virus <3> The hepatitis A virus <4> The hepatitis E virus <5> The TTV virus.
Example Output: 1

Example Input: Question: The following are zoonotic: 
 Options:  <1> Rotavirus. <2> Paramyxovirus. <3> Cytomegalovirus. <4> Arenavirus. <5> Parvovirus.
Example Output: 4

Example Input: Question: The afferent neural activity of the peripheral nocioceptors is modulated in the dorsal horn of the marrow, which acts as a door that prevents or does not allow the passage of nerve impulses that come from the nocioceptors and the cortex, refers to? 
 Options:  <1> The peripheral nervous system. <2> The theory of the door. <3> Chronic stress <4> The theory of climbing. <5> The biological process of relaxation.
Example Output:
2