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: The black indicator of Eriochrome T (N.E.T.) has the following colors depending on the pH:
Options: <0> H2Inrojo, HIn2- blue, In3- orange and when complexed with metal it is red. <1> H2Inazul, HIn2- red, In3- orange and when complexed with metal it is red. <2> H2Inrojo, HIn2- blue, In3- red wine and when complexed with metal it is orange. <3> H2In-red, HIn2- orange, In3- blue and when complexed with metal it is orange. <4> H2Inazul, HIn2- orange, In3- red and when complexed with metal is orange.
Output:
pharmacology