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: Form B of DNA:
Options: <0> It is formed by a double helix levorotatory with two antiparallel nucleotide chains. <1> It is wider and longer than form A. <2> It has pairs of nitrogenous bases perpendicular to the axis of the helix. <3> Corresponds to dehydrated DNA. <4> It is the minority form presented by DNA under physiological conditions.

A: chemistry
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Q: Question: The valvulopathy that triggers an overload of volume in both the left atrium and ventricle is:
Options: <0> Mitral stenosis. <1> Mitral insufficiency <2> Aortic stenosis. <3> Aortic insufficiency <4> Tricuspid insufficiency.

A: pharmacology
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Q: Question: Acetylsalicylic acid is a compound whose pKa is 3.5. What percentage of a dose of this product can be absorbed in the stomach fasting (pH 1.5)?
Options: <0> Less than 10% <1> Between 10% and 20%. <2> More than 90% <3> Between 20% and 40%. <4> 50%

A:
pharmacology
****