instruction:
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.
question:
Question: The chloride present in a solution can be determined volumetrically, by the Mohr method, using Ag (I) as a reagent. What indicator is used in this assessment ?: 
 Options:  <0> K2Cr2O7. <1> Fe2 (SO4) 3. <2> K2CrO4. <3> KSCN <4> FeSO4.
answer:
chemistry


question:
Question: One of the components of injectable formulations are preservatives. This category includes different excipients with different mechanisms of action. Which of the following is used as a chelating agent ?: 
 Options:  <0> Butylhydroxyanisole. <1> Ethylenediaminetetraacetic acid. <2> Ascorbic acid. <3> Propyl gelate <4> Tocopherol.
answer:
pharmacology


question:
Question: Along with Behavioral Cognitive Therapy, what other therapeutic approach has consistently shown to be an effective treatment for bulimia nervosa ?: 
 Options:  <0> Interpersonal psychotherapy <1> Mentalization therapy <2> The exposure therapy in imagination. <3> The economy of chips. <4> The therapy of schemes.
answer:

psychology