You will be given a definition of a task first, then some input of the task.
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.

Question: Starch is a specific indicator used to indicate the endpoint in redox titrations with: 
 Options:  <0> Cerium. <1> Iodo. <2> Bromine. <3> Permanganate. <4> Dichromate
Output:
pharmacology