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.

Q: Question: Sumatriptan is a first generation anti-migrant triptan, structurally characterized by having a heterocycle:
Options: <0> Imidazoic <1> Piperidinic <2> Indic. <3> Pirrolico. <4> Oxazolic.

A: pharmacology
****
Q: Question: What kind of image appears when the individual does not fixate his attention on it and, on the contrary, disappears when he concentrates on the experience?
Options: <0> Consecutive images <1> Mnemic images. <2> Hallucinoid images. <3> Abnormal images <4> Parasitic images

A: psychology
****
Q: Question: Clostridium perfringens can cause various infections, including:
Options: <0> The anthrax. <1> Pseudomembranous colitis. <2> The gas gangrene. <3> Tetanus <4> The syndrome of scalded skin.

A:
pharmacology
****