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: 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.
[A]: pharmacology


[Q]: Question: To control the expression of certain genes according to population density, bacteria use systems of: 
 Options:  <0> Strict response <1> Two components <2> Perception of the quorum. <3> Densitometric adaptation. <4> Negative activation
[A]: biology


[Q]: Question: Separations by capillary zone electropheresis (CZE) are characterized in that the electrophoretic medium: 
 Options:  <0> It is always formed by 1.0 M HCl. <1> It is always formed by NH3 1.0 M. <2> It is homogeneous throughout the capillary. <3> It is not homogeneous throughout the capillary. <4> It has a pH gradient throughout the entire capillary.
[A]:
chemistry