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: Relating to topoisomerases: 
 Options:  <0> They are enzymes that convert the D-amino acids into L-amino acids. <1> They are enzymes that synthesize DNA. <2> They are enzymes that participate in the union of the subunits of the ribosome. <3> They are enzymes that denature DNA. <4> DNA gyrase is a special toposiomerase.

Answer: chemistry


Question: Question: Why is the presence of lentigo in older people? 
 Options:  <0> Cell dehydration <1> Small hemorrhages due to capillary fragility. <2> Hyperplasia of intraepidermal melanocytes. <3> Deficiency of collagen and elastin. <4> Lipofuscin deposits.

Answer: nursery


Question: Question: For wound care and depending on their evolution, there is a wide variety of dressings on the market. From the following statements, point out the correct one: 
 Options:  <0> The gauzes always keep the wound in humid conditions. <1> The hydrogel dressing is used to maintain a dry wound. <2> Transparent films are used for infected wounds. <3> Hydrocolloid dressings are used in moist environment cures. <4> The foam dressing is used to maintain a dry wound environment.

Answer:
nursery