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: Cyclopentadiene is so reactive that leaving it at room temperature slowly dimerizes by a reaction of: 
 Options:  <0> Friedel-Crafts. <1> Diels-Alder. <2> Markovnikov. <3> Suzuki <4> Gabriel.
Example Output: chemistry

Example Input: Question: How many chromosomes would a male with nulisomy have for chromosomes 17 and 18? 
 Options:  <0> 43 <1> Four. Five. <2> 44 <3> 42 <4> 40
Example Output: biology

Example Input: Question: The arenio ion is a reaction intermediate that is formed in the reactions of: 
 Options:  <0> Electrophilic addition. <1> Electrophilic aromatic substitution. <2> Nucleophilic substitution. <3> Nucleophilic addition. <4> Aromatic nucleophilic substitution.
Example Output:
chemistry