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: Regarding the stability of the drugs of a proteinaceous nature of biotechnological drugs, we can say: 
 Options:  <0> Which is strongly dependent on pH. <1> That is little affected by ionic strength. <2> That being generally so high does not usually give problems in the formulation. <3> That its maximum value occurs at the pH value of lower solubility. <4> That has a slight dependence on the temperature.
[A]: pharmacology


[Q]: Question: By means of the angular methods used to evaluate the flow properties of a powder, it is determined: 
 Options:  <0> The ease with which the solid sets in motion. <1> The angle of repose. <2> The flow velocity <3> The resistance to displacement. <4> The density of the powder.
[A]: pharmacology


[Q]: Question: The nurse identifies that the person she has evaluated presents a series of manifestations that correspond to the defining characteristics of a diagnostic label, however, does not identify any possible cause. How should you enunciate the diagnosis following the guidelines of the PES format? 
 Options:  <0> Problem related to unknown cause manifested by the defining characteristics identified. <1> Using the term related to instead of due to, between problem and etiology. <2> As a risk diagnosis. <3> Problem related to the defining characteristics identified. <4> The absence of cause means that there is no problem, so a diagnosis could not be stated.
[A]:
nursery