Instructions: 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: From the point of view of the metabolism of xenobiotics, what is the cause of the hepatotoxicity and the carcinogenic action of aflatoxins?
Options: <0> Its hydrolysis releases aromatic amines. <1> Its metabolism of phase II generates a nitrenium cation, which is cytotoxic by reacting with DNA. <2> Its hepatic metabolism originates an epoxide, which forms a covalent bond with DNA guanine. <3> Your metabolism leads to a reactive species through a process of reductive bioactivation. <4> They facilitate the information of reactive oxygen species through a radical mechanism.
Output:
pharmacology