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: Question linked to image # 12 In the CT that is shown, the most likely diagnosis is: 
 Options:  <0> Polycystic kidney disease <1> Retroperitoneal mass. <2> Renal tuberculosis <3> Renal cystic neoplasia. <4> Obstructive uropathy.
[EX A]: medicine

[EX Q]: Question: Aspirin is an inhibitor of the synthesis of: 
 Options:  <0> Sterols <1> Prostaglandins <2> Phosphoacylglycerides. <3> Arachidonic acid. <4> Glycerophospholipids.
[EX A]: pharmacology

[EX Q]: Question: The term isocratic is used in high pressure liquid chromatography (HPLC) when: 
 Options:  <0> The mobile phase is at a constant temperature. <1> The stationary phase is in equilibrium with the mobile phase. <2> The mobile phase consists of a single solvent with a constant composition. <3> The flow rate of the mobile phase is regulated. <4> All the options are correct.
[EX A]:
chemistry