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: Why is chlorophyll green ?: 
 Options:  <0> Absorbs all wavelengths of the visible spectrum. <1> Absorbs wavelengths only from the red and ultra-red parts of the spectrum (680nm, 700nm). <2> Absorbs wavelengths in the red and blue parts of the visible spectrum. <3> Absorbs wavelengths only from the blue part of the visible spectrum. <4> Absorbs in the near ultraviolet.

A: chemistry
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Q: Question: A 70-year-old woman with a history of hypertension and moderate heart failure attended the clinic due to a persistent and dry cough that started as a sensation of itching in the throat. In the analytical hyperkalemia is observed. What is the drug suspected of causing the clinical and analytical alteration of the patient? 
 Options:  <0> Hydrochlorothiazide. <1> Bisoprolol. <2> Furosemide. <3> Enalapril <4> Hydralazine

A: medicine
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Q: Question: Which of the following tests is more important for the diagnosis of acute leukemia? 
 Options:  <0> Karyotype <1> Medulogram <2> Hemogram <3> PET. <4> Lumbar puncture.

A:
pharmacology
****