You will be given a definition of a task first, then some input of the task.
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: 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.
Output:
chemistry