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: 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.
psychology

Question: Reactions that use copper (I) salts as reagents to replace the nitrogen in the diazonium salts are called reactions of:
Options: <0> Sandmeyer <1> Chichibabin <2> Peterson. <3> Gabriel. <4> Diels-Alder.
chemistry

Question: Type III hypersensitivity reactions are characterized by:
Options: <0> The activation of mast cells. <1> The deposit of immunocomplexes. <2> The activation of macrophages. <3> Appearance of a neutrophil infiltrate. <4> Cytotoxicity reactions.
pharmacology