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: Indicate which of the following statements is true about bilirubin: 
 Options:  <0> It is a catabolic product of the heme group. <1> It is a product of the urea cycle. <2> It is an intermediary of the Krebs cycle. <3> It is a precursor of hepatic gluconeogenesis. <4> It is a product of cholesterol degradation.
[A]: chemistry


[Q]: Question: To measure the pulmonary wedge pressure (PEP) by means of a pulmonary artery catheter, it is advisable to take into account that: 
 Options:  <0> It is not necessary to inflate the ball. <1> The catheter should always be inserted with the balloon inflated, but at half the recommended volume. <2> The volume of balloon inflation is usually 1.5 ml of air. <3> The volume of inflation of the balloon is usually 3 ml of air. <4> You have to leave the balloon always inflated after making the determinations of PEP.
[A]: nursery


[Q]: Question: Generates hydrogen peroxide in the phagosome: 
 Options:  <0> Myeloperoxidase <1> Carbonic anhydrase. <2> NADPH oxidase. <3> Cytochrome C oxidase. <4> Superoxide dismutase.
[A]:
biology