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 most important causative agents of cervical cancer are: 
 Options:  <0> Papilomavirus. <1> Polyomavirus <2> Retrovirus. <3> Cytomegalovirus. <4> Parvovirus.
[EX A]: biology

[EX Q]: Question: A calcium figure of 11 mg / dL (normal less than 10.5 mg / dL) is found in a 30-year-old patient during a routine business examination. The PTH determination was 45 pg / ml (VN 10-55 pg / ml). The story is anodyne, except for the fact that the mother and the paternal grandfather were diagnosed with hyperparathyroidism and intervened, although they remained hypercalcemic. Which test is most useful to confirm the diagnosis? 
 Options:  <0> 25-OH D. <1> 1,25-OH 2D. <2> Calcium / creatinine ratio in urine. <3> Tubular reabsorption of phosphates. <4> PTHrP.
[EX A]: medicine

[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