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'.
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Question: Question: When centrifuging human peripheral blood in a density gradient in Ficoll: 
 Options:  <1> The mononuclear cells float on the Ficoll. <2> The lymphocytes remain in the background. <3> The erythrocytes float on the Ficoll. <4> The granulocytes float on the Ficoll. <5> The monocytes remain in the background.

Answer: 1


Question: Question: The set of means and systems that facilitate the contact of the infectious agent with the recipient subject corresponds to: 
 Options:  <1> Source of infection. <2> Habitat. <3> Transmission mechanism. <4> Biotope <5> Reservoir.

Answer: 3


Question: Question: Point out the CORRECT statement about the treatment program for the challenging defiant disorder created by Barkley: 
 Options:  <1> Its main scope of application is the classroom. <2> It makes an intensive use of modeling. <3> It is a training program for parents. <4> Comorbidity with ADHD discourages the application of this program. <5> It consists of twelve steps.

Answer:
3


