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: In studies that use meta-analysis for the systematic review of the results of psychotherapies, which is the most used dependent variable? : 
 Options:  <0> The number of depressive symptoms. <1> The size of the effect. <2> The systematized observation of the therapist. <3> The number of patients that has been cured. <4> The expectations of the patient.
answer:
psychology


question:
Question: The virions of the Arenavirus contain: 
 Options:  <0> A linear single-stranded RNA molecule. <1> Two equal molecules of linear double-stranded RNA. <2> Two different molecules of linear single-stranded RNA. <3> Two distinct molecules of single-stranded circular RNA. <4> Two identical molecules of single-stranded circular RNA.
answer:
biology


question:
Question: P. L. is a patient with frequent urinary infections. When explaining the possible causes of the same will comment that a risk factor is: 
 Options:  <0> The presence of urinary stones. <1> The intake of substances that acidify the urine. <2> The increase of leukocytes in urine. <3> The saturation of urine by calcium salts. <4> The emission of urine every 2 or 3 hours.
answer:

nursery