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: In the processing and presentation of peptides of extracellular origin intervene (n):
Options: <0> The TAP proteins. <1> The tapasina. <2> The HLA-DM molecule. <3> The proteosome. <4> The HLA-B molecules.
[EX A]: biology

[EX Q]: Question: What is the mechanism of action of octreotide ?:
Options: <0> Serotonergic receptor 5-HT4 agonist. <1> Motilin receptor agonist. <2> Somatostatin receptor agonist. <3> Antagonist of the motilin receptor. <4> Somatostatin receptor antagonist.
[EX A]: pharmacology

[EX Q]: Question: They are reservoirs of Q fever (Coxiella burnetti):
Options: <0> Bats <1> Poultry. <2> Rodents <3> Dogs. <4> Cows, sheep and goats.
[EX A]:
biology