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: The Grignard reagents attack the epoxides to give, after the appropriate hydrolysis: 
 Options:  <0> Carboxylic acids. <1> Cyclic amides. <2> Open aliphatic chains. <3> Open-chain alcohols. <4> Cyclic ethers.
[EX A]: pharmacology

[EX 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.
[EX A]: chemistry

[EX Q]: Question: In relation to DNA replication, the term processivity indicates: 
 Options:  <0> Error rate of the polymerase. <1> Deletion of one or more bases in the DNA. <2> Specificity in the speed of replication. <3> The ability of the enzyme to catalyze multiple consecutive reactions without detaching from the substrate. <4> 1,2 and 3.
[EX A]:
chemistry