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: Echinocandins are antifungal compounds that act by inhibiting: 
 Options:  <0> The synthesis of ergosterol. <1> The synthesis of the cell wall. <2> The synthesis of DNA. <3> The synthesis of proteins. <4> The formation of microtubules.
[A]: pharmacology


[Q]: Question: The gas used to generate the ICP plasma (coupled induction plasma) is: 
 Options:  <0> Hydrogen for being diatomic, chemically inert and with a low ionization energy. <1> Oxygen because it is diatomic, highly reactive and with a high ionization energy. <2> Argon, being monatomic, chemically inert and with a high ionization energy. <3> Xenon, being monatomic, highly reactive and with a low ionization energy. <4> None of the above is correct, because the gas used is helium.
[A]: chemistry


[Q]: Question: Hyperoxia or oxygen toxicity can cause signs and symptoms such as: 
 Options:  <0> Substernal pain <1> Paresthesias of the extremities. <2> Fatigue and general malaise. <3> Dyspnea and progressive respiratory distress. <4> All are true.
[A]:
nursery