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: Hypokalemia is a physiological symptom that can typically occur: 
 Options:  <0> In sleep disorders. <1> In addictions. <2> In anorexia nervosa. <3> In bulimia but not in anorexia nervosa. <4> In disorders of attention deficit and disturbing behavior.
answer:
psychology


question:
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.
answer:
chemistry


question:
Question: Different cytokines induce the isotype change of the different classes of antibodies. Of the following cytokine / isotype pairs, choose the correct one: 
 Options:  <0> IL-4 / IgE. <1> IL-4 / IgM. <2> IL-5 / IgG. <3> IFN- / IgM. <4> TGF- / IgA.
answer:

pharmacology