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: Under physiological conditions, the secondary structure of the most frequent DNA in the cells is: 
 Options:  <0> B-DNA. <1> Z-DNA. <2> A-DNA. <3> G-DNA. <4> H-DNA.

Answer: biology


Question: Question: The Research Diagnostic Criteria (ICD-10) for the crisis of anguish: 
 Options:  <0> They are identical to the DSM-IV, there is no variation. <1> They are identical to those of DSM-IV, except that ICD-10 includes dry mouth and requires that at least one of the symptoms present be palpitations, sweating, tremors or dry mouth. <2> They differ in their entirety from those of the DSM-IV. <3> The ICD-10 Diagnostic Criteria do not require the appearance of a minimum of crisis. <4> The ICD-10 Diagnostic Criteria do not require a period of duration.

Answer: psychology


Question: Question: A 72-year-old woman with type 2 diabetes and chronic renal failure in stage 5. If a pulmonary thromboembolism is suspected, indicate which diagnostic test would be contraindicated: 
 Options:  <0> Transthoracic echocardiogram. <1> Pulmonary scintigraphy <2> Pulmonary angioCT. <3> Electrocardiogram. <4> Chest x-ray.

Answer:
medicine