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.

[Q]: 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.
[A]: biology


[Q]: Question: It has been 24 hours since D. J., 28, has undergone an abdominal surgery. When he enters the room he smiles and jokes with the visitors. The blood pressure is 130/74 mmHg, the heart rate is 80, and the respiratory rate is 18. He tells him that he has pain and on a numerical scale of pain intensity from 0 (without pain) to 10 (the worst possible pain), DJ scores his pain in 8. Based on these data, point out the number you would choose to represent the assessment of this man's pain: 
 Options:  <0> 9. <1> 8 <2> 7 <3> 6 <4> 5.
[A]: nursery


[Q]: Question: The set of social mechanisms whose function is the transformation of specialized products in the form of health services for society, is called system: 
 Options:  <0> Sanitary. <1> Social. <2> Social insurance. <3> Liberal. <4> From the market
[A]:
nursery