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.

[EX Q]: Question: The epithelium of the epidermis is: 
 Options:  <0> Stratified keratinized plane. <1> Stratified non-keratinized plane. <2> Simple keratinized cylindrical. <3> Keratinized stratified cylindrical. <4> Cubic stratified.
[EX A]: biology

[EX Q]: Question: Which of the following actions does insulin exert on liver tissue? 
 Options:  <0> It inhibits the uptake of glucose. <1> Activates lipolysis. <2> Inhibits the synthesis of fatty acids. <3> Activates glycogen synthesis. <4> Activates glycogenolysis.
[EX A]: pharmacology

[EX Q]: Question: The calcofluor white stain allows observing: 
 Options:  <0> Spirochetes <1> Bacterial endospores. <2> Bacterial flagella. <3> Hyphae of filamentous fungi. <4> Metachromatic corpuscles.
[EX A]:
pharmacology