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 state characterized by a total absence of consciousness, muscle laxity, absence of response to painful stimuli and posterior lacunar amnesia, is called:
Options: <0> Drowsiness. <1> Mental absence <2> Stupor. <3> Coma. <4> Obnubilation.
[EX A]: psychology

[EX Q]: Question: In the process of defecation is TRUE:
Options: <0> When the feces penetrate the rectal ampulla, relaxation of the internal anal sphincter occurs consciously. <1> When the feces penetrate the rectal ampulla, the external anal sphincter relaxes unconsciously. <2> The external anal sphincter is controlled by nerve fibers of the pudendal nerve, part of the somatic nervous system, and therefore under voluntary conscious control. <3> The propulsive movements of the colon under normal conditions require one hour to move the chyme through the entire colon from the ileocal valve. <4> During defecation the contraction of the floor of the pelvis occurs.
[EX A]: medicine

[EX Q]: Question: The QT interval of the electrocardiogram indicates the duration of:
Options: <0> Atrial contraction <1> Ventricular contraction. <2> Ventricular relaxation <3> Atrial relaxation <4> Delay in the atrioventricular node.
[EX A]:
biology