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.
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Question: Question: What type of mechanism does Gestalt propose as an explanatory mechanism for solving a problem ?: 
 Options:  <0> The trial and error. <1> The search for operations in the problem space. <2> The algorithmic methods. <3> The huerísticos methods. <4> The insight.

Answer: psychology


Question: Question: The diagnosis of sarcoidosis is based on: 
 Options:  <0> Clinical-radiological compatible picture and presence of non-caseating granulomas in one or more organs, with negative cultures of mycobacteria and fungi. <1> Elevation of the serum level of the angiotensin conversion enzyme in a patient with a compatible clinical-radiological picture. <2> Characteristic radiological findings in high-resolution computed tomography of the chest in a patient with clinical suspicion. <3> Presence of lymphocytic alveolitis with predominance of CD4 + lymphocytes in bronchoalveolar lavage in a patient with a compatible clinical-radiological picture. <4> Finding of granulomatous cellularity in a fine needle aspiration puncture (FNAP) of an affected organ in a patient with a compatible clinical-radiological picture.

Answer: medicine


Question: Question: The R-bands of human metaphase chromosomes: 
 Options:  <0> They contain DNA rich in AT pairs. <1> They have high gene density. <2> They contain poor DNA in GC pairs. <3> They replicate at the end of phase S. <4> They have low gene density.

Answer:
biology