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: One of the main concepts of Acceptance and Commitment Therapy is: 
 Options:  <0> The relativization of the context. <1> The underlying reason. <2> The experiential avoidance. <3> The resistance to change. <4> Emotional vulnerability
[EX A]: psychology

[EX Q]: Question: Cyclopentadiene is so reactive that leaving it at room temperature slowly dimerizes by a reaction of: 
 Options:  <0> Friedel-Crafts. <1> Diels-Alder. <2> Markovnikov. <3> Suzuki <4> Gabriel.
[EX A]: chemistry

[EX Q]: Question: Mass spectrometry is combined with chromatography to generate a very powerful analytical tool. With regard to mass spectrometry (MS), it can be said that: 
 Options:  <0> The electronic ionization is based on the ion-molecule reactions between the reactive gas ions and the analyte molecules. <1> The linear quadrupole mass analyzer consists of four cylinders that are placed in parallel so that they are positively and negatively charged alternately. <2> The flight time analyzer is based on a tube of highly charged material so that only the opposite charge ions enter and separate. <3> The ion trap can be placed at the end of the chromatographic column for molecular ions from the already separated analytes and impact on the screen of a radioactive detector. <4> The ionization method known as MALDI is based on the desorption of ions from a matrix in the form of a gel by rapid bombardment of supercritical gas.
[EX A]:
chemistry