instruction:
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.
question:
Question: The mitochondrial genome: 
 Options:  <0> It is circular. <1> It is single-strand. <2> It encodes all mitochondrial proteins. <3> It is part of the nuclear DNA. <4> None of the above.
answer:
chemistry


question:
Question: When an experimental design is carried out, it is fundamentally sought: 
 Options:  <0> Know better the average of the results obtained and repeated in an experiment. <1> Know better the median of the results obtained in an experiment. <2> Identify better the factors that can affect the experiment. <3> To better identify the regression equations in an experiment. <4> To know better the standard deviation of the different data in the experiment.
answer:
chemistry


question:
Question: By cooling rapidly to room temperature and tempering an ordinary (low carbon) steel in water, the structure known as: 
 Options:  <0> Perlite <1> Spheroidite <2> Bainita <3> Ferrita. <4> Martensita
answer:

chemistry