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 most appropriate microscopy to identify Treponema pallidum in exudates from syphilitic lesions is: 
 Options:  <1> Clear field without staining. <2> Clear field with simple staining. <3> Dark field <4> Phase contrast. <5> Polarized light

Ex Output:
3


Ex Input:
Question: A key reaction in the regulation of gene expression is acetylation / desatethylation in the histones of some of its residues: 
 Options:  <1> Serina <2> Threonine <3> Lysine <4> Tryptophan <5> To the girl.

Ex Output:
3


Ex Input:
Question: DNA fotoliasa: 
 Options:  <1> Repairs cyclobutane pyrimidine dimers in the presence of visible light. <2> It binds to DNA specifically in purine dimers. <3> It contains three chromophores. <4> It is present in all eukaryotic cells. <5> It breaks the bonds that link pyrimidine rings and then dissociates in the presence of visible light.

Ex Output:

1