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: The innate immune response to viruses is mainly mediated by lymphocytes: 
 Options:  <1> B1 <2> Th1. <3> Cytolytic T <4> NK <5> Tγδ.
Example Output: 4

Example Input: Question: In the preoperative period (2-6 years) the child usually thinks that the things of nature (rivers, mountains, etc.) have been built by the human being. This feature is called: 
 Options:  <1> Animism. <2> Realism. <3> Artificialism <4> Utilitarianism. <5> Pre-operative error
Example Output: 3

Example Input: Question: Immediately after the herpes virus decapsidation takes place: 
 Options:  <1> Synthesis of an own RNA polymerase. <2> Circularization of its genome. <3> Lysis of the endosome. <4> Transcription of the viral DNA polymerase. <5> Synthesis of a protein that inhibits the replication of the host cell.
Example Output:
2