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: The reaction of 1H-indole with electrophiles takes place selectively on the atom in position: 
 Options:  <0> one. <1> two. <2> 3. <3> Four. <4> 5.
[A]: chemistry


[Q]: Question: The mitochondrial genome: 
 Options:  <0> It is circular. <1> It is single-strand. <2> It encodes all mitochondrial proteins. <3> It is part of the nuclear DNA. <4> None of the above.
[A]: chemistry


[Q]: Question: In the first stage of Fairburn's behavioral cognitive treatment for bulimia nervosa, one of the objectives is: 
 Options:  <0> Modify maladaptive social interaction patterns. <1> Establish effective communication patterns. <2> Work on the suppression of diet follow-up. <3> Modify adaptive family functioning patterns. <4> Present the model that explains the maintenance of the problem.
[A]:
psychology