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.
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Question: Question: A coulometric evaluation: 
 Options:  <0> You do not need the current performance to be 100%. <1> It does not need an indicator system of the end point. <2> Always use a potentiostatic system. <3> It uses a titrant that is generated electrolytically. <4> You need a burette to add the titrant.

Answer: chemistry


Question: 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.

Answer: psychology


Question: Question: Controls the passage of substances to the central nervous system: 
 Options:  <0> Meninges. <1> Choroid plexus. <2> Hemato-encephalic barrier. <3> White substance <4> Schwann cells and oligodendrocytes.

Answer:
biology