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 oxygen of the ethers as that of the alcohols can be protonated to generate: 
 Options:  <0> Iminium ion. <1> Alkaloxonium ions. <2> Peroxides <3> Piranos. <4> Enaminas
[A]: chemistry


[Q]: Question: Within the main phases of extrusion and spheronization we have: 
 Options:  <0> Dry mix, wet kneading and compaction. <1> Wet kneading, compaction and drying. <2> Wet mixing, compaction, and drying. <3> Wet kneading, drying and sieving. <4> Kneading dry, drying and sieving.
[A]: pharmacology


[Q]: Question: The exergonic reactions of metabolism: 
 Options:  <0> Consume free energy. <1> They are thermodynamically favorable. <2> They are always quick reactions. <3> They do not require the action of enzymes. <4> They have high values ​​of activation energy.
[A]:
biology