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.
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Question: Question: What is the purpose of the phthalyl group in phthalisulfatiazole ?: 
 Options:  <0> Improve intestinal absorption. <1> Prevent intestinal absorption. <2> Improve the passage through the blood-brain barrier. <3> Prevent passage through the blood-brain barrier. <4> Increase the affinity towards the therapeutic target of the drug.

Answer: pharmacology


Question: Question: The main virulence factor of Streptococcus pneumoniae is one (one): 
 Options:  <0> Fímbria. <1> Capsule. <2> Scourge <3> Endotoxin <4> Adhesin

Answer: biology


Question: Question: All the following events occur during the formation of phosphoenolpyruvate from pyruvate EXCEPT: 
 Options:  <0> CO2 is consumed. <1> CO2 comes out. <2> CoA is needed. <3> ATP hydrolyzes. <4> GTP is hydrolyzed.

Answer:
chemistry