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.

[EX Q]: Question: What amino acids can be bound to a sugar by an O-glycosidic bond? 
 Options:  <0> Ser and Thr. <1> Cys and Ser. <2> Asn and Thr. <3> Lys and His. <4> Val and Leu.
[EX A]: chemistry

[EX Q]: Question: What do you usually associate with the cataplexy characteristic of narcolepsy? 
 Options:  <0> With sleep paralysis. <1> With intense emotions. <2> With hypnagogic and hypnopompic hallucinations. <3> With daytime sleepiness. <4> With irregular schedules.
[EX A]: psychology

[EX Q]: Question: Where does glycosylation take place in a eukaryotic cell? 
 Options:  <0> In the endoplasmic reticulum and the Golgi Apparatus. <1> Only in the Golgi Apparatus. <2> In the mitochondria and the Golgi Apparatus. <3> Only in the endoplasmic reticulum. <4> In the endoplasmic reticulum and the plasma membrane.
[EX A]:
chemistry