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 Input:
Question: The denaturing of proteins:
Options: <0> Alters the native conformation without affecting the biological activity. <1> It is always irreversible. <2> It can only be achieved by treatment with strong acids. <3> It does not affect the primary structure. <4> It produces the hydrolysis of the protein.

Ex Output:
biology

Ex Input:
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 Output:
chemistry

Ex Input:
Question: The characteristic of delusions that refers to the maintenance of delirium over time, despite the evidence against is:
Options: <0> The intensity or conviction. <1> The unmodifiable, incorrigibility or fixity. <2> Presence of cultural supports. <3> Concern. <4> Communication deviation.

Ex Output:
psychology