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: 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 initial procedure of choice to investigate a possible obstruction of the biliary tract is: 
 Options:  <0> Hepatobiliary ultrasound. <1> Endoscopic retrograde cholangiopancreatography (ERCP). <2> Colangio Magnetic Resonance. <3> Computed tomography. Abdominal CT <4> Percutaneous transhepatic cholangiography.
[EX A]: medicine

[EX Q]: Question: When performing an electrocardiogram you will notice that the QRS complex is predominantly negative in the derivation: 
 Options:  <0> V1 <1> AVF. <2> V5 <3> V6. <4> DIII.
[EX A]:
nursery