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: Which of the following modifications is not part of the maturation process suffered by the precursors of the tRNAs?
Options: <0> Modification of bases. <1> Elimination of the 5'-end leader sequence. <2> Elimination of the final segment of the 3 'end. <3> Addition of CCA to the 3 'end. <4> Polyadenylation of the 3'-end.
Output:
chemistry