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: Generates hydrogen peroxide in the phagosome: 
 Options:  <0> Myeloperoxidase <1> Carbonic anhydrase. <2> NADPH oxidase. <3> Cytochrome C oxidase. <4> Superoxide dismutase.
[EX A]: biology

[EX Q]: Question: Reactions that use copper (I) salts as reagents to replace the nitrogen in the diazonium salts are called reactions of: 
 Options:  <0> Sandmeyer <1> Chichibabin <2> Peterson. <3> Gabriel. <4> Diels-Alder.
[EX A]: chemistry

[EX Q]: Question: The main method for the preparation of βceto esters is the reaction known as: 
 Options:  <0> Malonic synthesis <1> Acetoacetic synthesis. <2> Condensing of Claisen. <3> Perkin reaction. <4> Hofmann reaction.
[EX A]:
pharmacology