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: 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.

A: biology
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Q: Question: About free radicals: 
 Options:  <0> They are compounds that contain two or three unpaired electrons in an outer orbital. <1> Reactive oxygen species (ROS) in the cell are only generated enzymatically. <2> Hydrogen peroxide is the most damaging radical in the cell. <3> The hydroxyl radical originates non-enzymatically (Heber-Weiss reaction) and damages proteins and DNA. <4> Oxygen is a triradical.

A: chemistry
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Q: Question: Within the Psychological Evaluation, the Self Registers, as a strategy to obtain information, how can they be considered? 
 Options:  <0> As a type of Experimental technique. <1> As a type of Self-reports. <2> As a modality of objective techniques. <3> As an Observational technique. <4> As a modality of the Semantic Differential of Osgood.

A:
psychology
****