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: Every experimental measurement is accompanied by the corresponding experimental error. Experimental errors are classified as systematic and random. On these last ones it is possible to be affirmed that:
Options: <0> They are due to a failure of the experiment or the equipment. <1> They generally cause a positive deviation from the measurement. <2> They are equally likely to be positive or negative. <3> They do not affect the final result because they are random. <4> They affect exclusively the accuracy of the results obtained.
Output:
chemistry