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.

Q: Question: The gas used to generate the ICP plasma (coupled induction plasma) is: 
 Options:  <0> Hydrogen for being diatomic, chemically inert and with a low ionization energy. <1> Oxygen because it is diatomic, highly reactive and with a high ionization energy. <2> Argon, being monatomic, chemically inert and with a high ionization energy. <3> Xenon, being monatomic, highly reactive and with a low ionization energy. <4> None of the above is correct, because the gas used is helium.

A: chemistry
****
Q: Question: The Scorecard is: 
 Options:  <0> The set of rules that govern the internal functioning of an institution. <1> A set of data and indicators, which serves as an information and control tool for management. <2> The list of the names and positions of the Steering Committee of an institution. <3> A control panel, used by the Directors of institutions, that allows them to access all electronic services and applications online. <4> An economic-financial report, which allows to know basically the deviations of the expenses and income of an institution.

A: nursery
****
Q: Question: A columbimétrica valuation: 
 Options:  <0> It is always done at controlled potential. <1> Always use a platinum macroelectrode. <2> It does not need a system indicating the end point. <3> You need the current to be controlled. <4> You always need the titrant to be added from a burette.

A:
chemistry
****