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: Thiamine pyrophosphate (PPT) is not coenzyme of:
Options: <0> Pyruvate dehydrogenase (synthesis of acetyl CoA). <1> Alpha-ketoglutarate dehydrogenase (citric acid cycle). <2> Transketolase (pentose phosphate pathway). <3> Transaldolase (pentose phosphate route). <4> Pyruvate decarboxylase (ethanolic fermentation).
[EX A]: pharmacology

[EX 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.
[EX A]: nursery

[EX Q]: Question: In the study of proteins. What is the purpose of treatment with -mercaptoethanol ?:
Options: <0> Hydrolyze the protein. <1> Break the disulfide bridges. <2> Add positive charges. <3> Add negative charges. <4> General an amino acid derivative in Edman degradation.
[EX A]:
chemistry