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 antibiotic tetracycline:
Options: <0> It binds to the 30S subunit and inhibits the binding of aminoacyl-tRNA. <1> Inhibits the peptidyltransferase activity of the 50S ribosomal subunit. <2> It binds to the 50S ribosomal subunit and inhibits translocation. <3> It inhibits the initiation and originates an erroneous reading of the mRNA. <4> It causes premature termination by acting as an analog of the aminoacyl-tRNA.
[EX A]: pharmacology

[EX Q]: Question: The formation of the complex called Aminophylline improves the solubility of one of the following drugs:
Options: <0> Theophylline <1> Digoxin <2> Ampicillin <3> Thioridazine. <4> Ciclosporin
[EX A]: pharmacology

[EX Q]: Question: The floor of the amniotic cavity is:
Options: <0> Trophoblast. <1> Hypoblast. <2> Epiblast <3> Endometrium <4> Myometrium
[EX A]:
biology