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'.

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

Ex Output:
4

Ex Input:
Question: In economic evaluations, which of the following costs correspond to indirect non-health costs?
Options: <1> Hospitalization of the patient. <2> Care at the patient's home. <3> Loss of patient productivity. <4> Travel expenses of the patient. <5> Rehabilitation of the patient.

Ex Output:
3

Ex Input:
Question: In the sequencing of DNA by the Sanger method:
Options: <1> The 2'-3' dideoxynucleotides are essential. <2> It is necessary to use suicide inhibitors of DNA polymerase. <3> DNA must maintain its double helix structure. <4> The DNA is hydrolyzed selectively. <5> The restriction endonucleases are fundamental.

Ex Output:
1