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: In the evaluation of a base with hydrochloric acid, it is known that the equivalence point appears at pH 5.54. If the bromocresol purple is used as indicator, whose turning interval is 5.2-6.8, the end point is observed at pH: 
 Options:  <0> 6.0, with a small error by default. <1> 6.8, with an error by excess. <2> 5.2, with a small error for excess. <3> 5.54. There is no error <4> 6.0, with an error for excess.
Output:
chemistry