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'.

Q: Question: The main indication for using 4 drugs in the initial treatment of tuberculosis is: 
 Options:  <1> Affectation of the central nervous system. <2> High prevalence of primary resistance to isoniazid. <3> Cavitated and extensive pulmonary tuberculosis with large bacillary load. <4> Disseminated tuberculosis associated with HIV infection. <5> Extrapulmonary tuberculosis in immunodepressed patients of any origin.

A: 2
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Q: Question: The reaction product of cyclohexanone with bromine catalyzed by a base is: 
 Options:  <1> 2-Bromocyclohexanone. <2> 2,2-Dibromocyclohexanone. <3> 2,2,6-Tribomociclohexanona. <4> 1,1-Dibromocyclohexane. <5> 2,2,6,6-Tetrabromocyclohexanone.

A: 5
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Q: Question: Heterochromatin lacks: 
 Options:  <1> Histone H1. <2> Nucleosomes <3> Exons <4> Transcriptional activity <5> Origins of replication.

A:
4
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