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: Agoraphobia is an anxiety disorder that consists of: 
 Options:  <0> An anxiety crisis or panic attacks that usually occur in an unexpected way. <1> An intense and persistent fear of performing public performances. <2> The presence of obsessions or compulsions of a recurring nature that cause great losses of time. <3> An acute mental disorder with a low socioeconomic and health burden. <4> The fear and avoidance of crowded places or situations from which it is difficult to escape.
nursery

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.
biology

Question: Voltammetry of anodic redissolution: 
 Options:  <0> It is always carried out with mercury film electrodes. <1> It uses an oxidation process with chemical agents. <2> It is based on the formation of mercury salts in the electrode. <3> It does not need background electrolyte. <4> It has an electrodeposition stage.

chemistry