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: Which glands are located between the skin and the masseter muscle, in front and under the outer ear? 
 Options:  <0> Parotid glands <1> Submandibular glands <2> Sublingual glands <3> Mouth glands <4> Lieberkühn's glands.
[A]: pharmacology


[Q]: Question: Relating to topoisomerases: 
 Options:  <0> They are enzymes that convert the D-amino acids into L-amino acids. <1> They are enzymes that synthesize DNA. <2> They are enzymes that participate in the union of the subunits of the ribosome. <3> They are enzymes that denature DNA. <4> DNA gyrase is a special toposiomerase.
[A]: chemistry


[Q]: Question: The reaction of 3-methylcyclohex-2-enone with lithium dibutyl caprate and subsequent addition of chlorotrimethylsilane gives: 
 Options:  <0> [(3-Butyl-3-methylcyclohex-1-en-1-yl) oxy] trimethylsilane. <1> [(1-Butyl-3-methylcyclohex-2-en-1-yl) oxy] trimethylsilane. <2> Nothing. <3> 3-Butyl-3-methyl-2- (trimethylsilyl) cyclohexanone. <4> [(6-Butoxy-3-methylcyclohex-1-en-1-yl) oxy] trimethylsilane.
[A]:
chemistry