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: The antiulcer drug called omeprazole has in its structure:
Options: <0> A benzimidazole heterocycle. <1> A thiol group. <2> A pyrazole heterocycle. <3> A dimethylamino group. <4> A thiozolic heterocycle.
[EX A]: pharmacology

[EX Q]: Question: Question linked to image No. 1 In the same patient, from the observation of the chest x-ray, it can be deduced:
Options: <0> That the patient has pulmonary metastases. <1> Suspected nosocomial pneumonia. <2> A failure (dehiscence) of the colonic anastomosis should be considered. <3> Suspicion of PET <4> You have an infection of the surgical wound.
[EX A]: medicine

[EX Q]: Question: What simple reinforcement programs produce a more stable response pattern ?:
Options: <0> Those of fixed ratio. <1> Those of variable reason. <2> Those of fixed interval. <3> Those of variable interval. <4> All reinforcement programs produce similar response rates.
[EX A]:
psychology