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: When administering oxygen therapy to a patient admitted to the emergency room due to exacerbated COPD, you should take into account that: 
 Options:  <0> The flow of oxygen must be high, since respiratory failure is accompanied by hypoxia. <1> The concentration of oxygen is conditioned by the patient's clinical situation. <2> The concentration of oxygen must be equal to the atmospheric concentration, since the patient presents hypercapnia. <3> The flow should be low, since hypoxia is the only stimulus to breathe. <4> The flow must be adjusted to achieve a PO2 greater than 90 mmHg.
[A]: nursery


[Q]: Question: Indicate which of the following compounds has antioxidant action: 
 Options:  <0> Vitamin B. <1> Vitamin D. <2> Vitamin E. <3> All the previous ones <4> None of the above.
[A]: chemistry


[Q]: Question: What factors depends on the apparent volume of distribution of a drug ?: 
 Options:  <0> Its degree of binding to plasma and tissue proteins and its elimination half-life. <1> Of its distribution coefficient and its elimination half-life. <2> Of its elimination half-life and its elimination constant. <3> Its degree of binding to plasma and tissue proteins and their distribution coefficient. <4> Of its constant elimination and its clearing.
[A]:
medicine