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: In eukaryotes, the DNA polymerase β: 
 Options:  <0> It is a polymerase of family B. <1> It carries out the synthesis and repair of mitochondrial DNA. <2> Replicate DNA with injuries. <3> It is involved in the repair of nuclear DNA. <4> The synthesis of nuclear DNA begins.
[EX A]: biology

[EX Q]: Question: Graphite: 
 Options:  <0> It gives intercalation compounds with fluorine. <1> Reacts with sodium to give a covalent compound with C ̶ Na bond. <2> Reacts with sodium to give intercalation compounds that have the same distance between layers that pure graphite had. <3> Reacts with sodium to give intercalation compounds that are better electrical conductors than pure graphite. <4> It gives covalent compounds with bromine with C ̶ Br bond.
[EX A]: chemistry

[EX Q]: Question: The delirious atmosphere is defined as: 
 Options:  <0> The delirious interpretation of a normal perception. <1> A self-referential idea, of great importance for the patient. <2> Subjective experience that the world has changed in a subtle but sinister, disturbing and difficult or impossible to define way. <3> The delirious construction of a memory. <4> A rational and easily modifiable idea about an environmental issue.
[EX A]:
psychology