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 Q]: Question: A coulometric evaluation:
Options: <0> You do not need the current performance to be 100%. <1> It does not need an indicator system of the end point. <2> Always use a potentiostatic system. <3> It uses a titrant that is generated electrolytically. <4> You need a burette to add the titrant.
[EX A]: chemistry

[EX Q]: Question: If in an epidemiological study, the participating population has voluntariness as an inclusion criterion, the validity of the results are subject to a bias of:
Options: <0> Information. <1> Confusion. <2> Selection. <3> Interpretation. <4> Publication.
[EX A]: nursery

[EX Q]: Question: Which of the following statements is NOT true about glucagon ?:
Options: <0> Activates hepatic glycogenesis. <1> Activates lipolysis in white adipose tissue. <2> Activates hepatic glycogenolysis. <3> It is a polypeptide. <4> It is synthesized in the cells of the islets of Langerhans of the pancreas.
[EX A]:
chemistry