Definition: 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.
Input: Question: Transpeptidation is the step in the biosynthesis of peptidoglycan in which:
Options: <0> The union of N-acetylmuramic acid with N-acetyl glucosamine occurs inside the bacterial cell. <1> The exit of the precursors from the cytoplasm to the outside takes place. <2> The binding of the precursor to the peptidoglycan occurs outside, by glycosidic bonds. <3> The binding, by means of interpeptide bridges, between peptidoglycan chains. <4> The autolisinas act forming pores in its structure.
Output:
pharmacology