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: Proton pump inhibitor drugs are useful in the treatment of: 
 Options:  <0> Constipation. <1> Corneal ulcer. <2> Peptic ulcer. <3> Traveler's diarrhea. <4> Crohn's disease.
answer:
nursery


question:
Question: Enzymatic regulation by reversible covalent modification: 
 Options:  <0> It involves the breaking of the peptide bond. <1> It requires the action of another enzyme. <2> It always involves phosphorylation reaction. <3> It never affects allosteric enzymes. <4> The enzyme never comes in two forms.
answer:
biology


question:
Question: With which author is associated the development and evaluation of cognitive-behavioral therapy in group as a gold standard treatment for social phobia? 
 Options:  <0> Clark. <1> Wells <2> There is. <3> Beck. <4> Heimberg.
answer:

psychology