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: Consider Input: Question: The reactions in which the kinetics does not depend on the nucleophilic concentration, are reactions: 
 Options:  <0> Radicals <1> SN1. <2> Pericyclic. <3> SN2. <4> None of the above.

Output: chemistry


Input: Consider Input: Question: Isopropyl alcohol is prepared from petroleum by hydration of: 
 Options:  <0> Isobutene <1> Eteno <2> Penteno <3> Buteno. <4> Propene

Output: chemistry


Input: Consider Input: Question: Which of the following statements about focal nodular hyperplasia of the liver is true? 
 Options:  <0> It is considered that its appearance is related to the consumption of contraceptives. <1> The risk of breakage hemoperitoneum is similar to that of the adenoma. <2> There is a risk of tumor degeneration. <3> It behaves as a focal hypovascular lesion in computed tomography with contrast administration. <4> In the histological study of the lesion, in addition to hepatocytes, bile ducts and other liver cells can be observed.


Output: medicine