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 Q]: 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 A]: 3

[EX Q]: Question: For which disorder is the technique of fading stimulated frequently used? 
 Options:  <1> Enuresis <2> The selective mutism. <3> Childhood asthma <4> Posttraumatic stress disorder secondary to sexual abuse. <5> The encopresis.
[EX A]: 2

[EX Q]: Question: The prozone effect of a turbidimetric analysis can be detected by measuring the absorbance: 
 Options:  <1> After an ultracentrifugation. <2> Previous concentration of the sample. <3> After dilution of the sample. <4> Once the sample was treated with SDS. <5> Two consecutive times.
[EX A]:
3