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.

Example Input: Question: Point out which of the following is more clearly a positive symptom of schizophrenia: 
 Options:  <0> The flat or dull affection. <1> The poverty of language. <2> The associability. <3> Hallucinations <4> The bulimia.
Example Output: psychology

Example Input: Question: Esters can be obtained from carboxylic acids and alcohols, by applying the Fischer esterification reaction in which: 
 Options:  <0> A base is used as a catalyst. <1> A ketone is used as the solvent. <2> A reducing reagent is used. <3> An oxidizing agent is used. <4> Acid catalysis is used.
Example Output: pharmacology

Example Input: Question: Corresponds to a gene mutation by transversion: 
 Options:  <0> T → C. <1> A → T. <2> G → A. <3> C → T. <4> A → G.
Example Output:
biology