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 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

A: 3
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Q: Question: In disorders related to substance use, what is physical dependence?
Options: <1> In a physical process of short duration. <2> In an intense sense of dissatisfaction for not being able to consume the substances. <3> In the action of consuming drugs producing a state of intoxication with psychoactive effect. <4> In a series of physical and psychic changes that take place after the administration of a substance. <5> In a state of physical adaptation manifested by intense physical disturbances when the administration of the drug is interrupted.

A: 5
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Q: Question: The Pearson correlation coefficient indicates that there is a statistical association between two variables when:
Options: <1> Its value is positive. <2> Its value is between -1 (minus one) and 1 (one). <3> Its value approaches zero. <4> Its value is equal or very similar to the sample size used for its calculation. <5> Its value approaches its possible extreme values, -1 (minus one) or 1 (one).

A:
5
****