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: The thromboxanes:
Options: <0> They induce platelet aggregation. <1> They inhibit platelet aggregation. <2> They act as bronchodilators in the respiratory system. <3> They are produced in the membranes of all cells. <4> They are derived from saturated fatty acids.
[A]: chemistry

[Q]: Question: Separations by capillary zone electropheresis (CZE) are characterized in that the electrophoretic medium:
Options: <0> It is always formed by 1.0 M HCl. <1> It is always formed by NH3 1.0 M. <2> It is homogeneous throughout the capillary. <3> It is not homogeneous throughout the capillary. <4> It has a pH gradient throughout the entire capillary.
[A]: chemistry

[Q]: Question: Which of the following nematodes is a large intestine parasite?
Options: <0> Trichuris trichiura. <1> Ancylostoma duodenale. <2> Trichinella spiralis. <3> Necator americanus. <4> Ascaris lumbricoides.
[A]:
pharmacology