TASK DEFINITION: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
PROBLEM: Question: The most appropriate microscopy to identify Treponema pallidum in exudates from syphilitic lesions is: 
 Options:  <0> Clear field without staining. <1> Clear field with simple staining. <2> Dark field <3> Phase contrast. <4> Polarized light

SOLUTION: biology

PROBLEM: Question: For the analysis of traces of inorganic constituents, in samples of organic nature, a preliminary treatment of the sample is needed, which normally consists of: 
 Options:  <0> Dissolve the sample in cold water. <1> Dissolve the sample in hot water. <2> Dissolve the sample between 30 and 70 ºC. <3> Heat the sample between 400 and 700 ºC. <4> Heat the sample in 0.1 M hydrochloric acid.

SOLUTION: chemistry

PROBLEM: Question: Indicate the correct option regarding the defined daily dose of a medicine: 
 Options:  <0> Corresponds to the maximum daily dose. <1> Corresponds to the initial dose of a treatment. <2> Corresponds to the maintenance dose for the indication that requires a lower dose. <3> Corresponds to the average daily maintenance dose. <4> Corresponds to the initial dose for the main indication.

SOLUTION:
pharmacology