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: 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.
[A]: biology

[Q]: Question: Inhibits the integrase of HIV the:
Options: <0> Efavirenz. <1> Tenofovir <2> Ritonavir <3> Emtricitabine. <4> Raltegravir
[A]: biology

[Q]: Question: Indicate the correct answer regarding the Lawton index as a scale of assessment in geriatrics:
Options: <0> Due to its complexity to be applied, it requires that the interviewer has been previously trained. <1> It must always be applied by direct observation of the person evaluated. <2> Several of its items are related to domestic tasks. <3> Evaluate the advanced activities of daily life. <4> Many of its items value activities associated with the male role.
[A]:
nursery