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 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.
[EX A]: biology

[EX Q]: Question: The glomerulonephritis syndrome occurs with: 
 Options:  <0> Oliguria and hematuria. <1> Polyuria and dehydration. <2> Loss of sodium in the urine. <3> Thrombosis and infections. <4> Loss of glucose in the urine.
[EX A]: pharmacology

[EX Q]: Question: Only one of the following cell types synthesizes interleukin IL-12; which one?: 
 Options:  <0> Cytotoxic T lymphocytes. <1> NK cells. <2> Myeloid dendritic cells. <3> Helper T lymphocytes. <4> Endothelial cells
[EX A]:
pharmacology