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: Observe that the liquids coming from the synthesis of chloroquine had an antibacterial activity gave rise to the discovery of the quinolones. This group of antibiotics has various characteristics such as: 
 Options:  <0> Fluoroquinolones have a smaller spectrum of activity than first-generation quinolones. <1> The second generation quinolones are very effective against anaerobes. <2> Fluoroquinolones are not effective against enterobacteria. <3> Fluoroquinolones are effective against Gram-positive but less than Gram-negative. <4> The third and fourth generation fluoroquinolones are not effective against streptococci or staphylococci.
[EX A]: pharmacology

[EX Q]: Question: Acetylsalicylic acid is a compound whose pKa is 3.5. What percentage of a dose of this product can be absorbed in the stomach fasting (pH 1.5)? 
 Options:  <0> Less than 10% <1> Between 10% and 20%. <2> More than 90% <3> Between 20% and 40%. <4> 50%
[EX A]: pharmacology

[EX Q]: Question: The typical red cells of sickle cell anemia are: 
 Options:  <0> Dianocitos. <1> Drepanocytes <2> Dacryocytes <3> Ovalocitos. <4> Acanthocytes
[EX A]:
biology