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 valvulopathy that triggers an overload of volume in both the left atrium and ventricle is: 
 Options:  <0> Mitral stenosis. <1> Mitral insufficiency <2> Aortic stenosis. <3> Aortic insufficiency <4> Tricuspid insufficiency.
[A]: pharmacology


[Q]: Question: The arginosuccinasa: 
 Options:  <0> In an enzyme of the citric acid cycle. <1> Converts arginine to lysine. <2> It is activated by the allosteric effector N-acetylglutamate. <3> It produces fumarate. <4> It is a glycogenic amino acid.
[A]: chemistry


[Q]: Question: Transpeptidation is the step in the biosynthesis of peptidoglycan in which: 
 Options:  <0> The union of N-acetylmuramic acid with N-acetyl glucosamine occurs inside the bacterial cell. <1> The exit of the precursors from the cytoplasm to the outside takes place. <2> The binding of the precursor to the peptidoglycan occurs outside, by glycosidic bonds. <3> The binding, by means of interpeptide bridges, between peptidoglycan chains. <4> The autolisinas act forming pores in its structure.
[A]:
pharmacology