TASK DEFINITION: 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.
PROBLEM: Question: Atenolol is an antihypertensive β-antagonist that belongs to the structural family: 
 Options:  <0> Arylethanolamines <1> Quinazolines <2> β-Haloalkylamines. <3> Aryloxypropanolamines. <4> 2-Imidazolines.

SOLUTION: pharmacology

PROBLEM: Question: The papillary muscles: 
 Options:  <0> They contract atrio-ventricular valves. <1> They prevent the reflux of blood to the atria. <2> They avoid the eversion of the semilunar valves. <3> They form the interventricular septum. <4> They are formed by visceral smooth muscle.

SOLUTION: biology

PROBLEM: 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.

SOLUTION:
biology