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: Neuraminidase of the influenza virus:
Options: <0> It is found inside the capsid and is released after entering the cell. <1> Its function is to facilitate the encapsulation of genetic material. <2> It is one of the spicules of the envelope. <3> It is not antigenic. <4> It facilitates the adsorption of the virus to the cell.
biology