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: Question linked to image # 12 In the CT that is shown, the most likely diagnosis is: 
 Options:  <0> Polycystic kidney disease <1> Retroperitoneal mass. <2> Renal tuberculosis <3> Renal cystic neoplasia. <4> Obstructive uropathy.

A: medicine
****
Q: Question: Epidemiology allows early detection of changes in the incidence of a certain disease in the population. For this, the most correct thing is to use: 
 Options:  <0> The etiological investigation. <1> The description of the natural history of the disease. <2> Epidemiological surveillance. <3> The evaluation of the functioning of the services. <4> None of the previous answers is correct.

A: nursery
****
Q: Question: What element plays a physiological role in the prevention of gastroesophageal reflux? 
 Options:  <0> Upper esophageal sphincter <1> Angle of His. <2> Hernia of Hiato. <3> Purkinje angle. <4> Pyloric sphincter

A:
pharmacology
****