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: Aflatoxin B1 is a natural product that owes its toxicity to a product of its metabolism, very reactive, of the nature of: 
 Options:  <0> 1,2-Diol. <1> Quinonymine <2> Epoxide <3> Α, β-unsaturated carbonyl. <4> Radical hydroperoxide.

A: pharmacology
****
Q: Question: Atenolol is an antihypertensive β-antagonist that belongs to the structural family: 
 Options:  <0> Arylethanolamines <1> Quinazolines <2> β-Haloalkylamines. <3> Aryloxypropanolamines. <4> 2-Imidazolines.

A: pharmacology
****
Q: Question: The association of advanced age, diabetes, otalgia that does not progress favorably despite the treatment and paralysis of the VII cranial nerve lead to think of one of the following clinical pictures as the first option: 
 Options:  <0> Nasopharyngeal carcinoma <1> Granular myringitis. <2> Diffuse labyrinthitis. <3> Carcinoma of the temporal bone. <4> Malignant external otitis

A:
medicine
****