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.

Ex Input:
Question: Which of these species is a free radical? 
 Options:  <0> The molecule NO. <1> The O2 molecule. <2> The N2O molecule. <3> The OH- anion. <4> The ClO- anion.

Ex Output:
chemistry


Ex Input:
Question: Reactions in which there are no intermediates are described as: 
 Options:  <0> Concerted. <1> Polar <2> Radicals <3> Homolitic <4> Heterolithic

Ex Output:
chemistry


Ex Input:
Question: The most appropriate microscopy to identify Treponema pallidum in exudates from syphilitic lesions is: 
 Options:  <0> Clear field without staining. <1> Clear field with simple staining. <2> Dark field <3> Phase contrast. <4> Polarized light

Ex Output:

biology