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: In suppression ion chromatography: 
 Options:  <0> A single column is used and the conductivity of the mobile phase is kept very low. <1> The eluent must be able to be removed selectively after separation and prior to the conductometric measurement. <2> The eluent incorporates a regenerating solution of strong acid flowing in the same direction as the mobile phase. <3> Weak exchangers are used from polystyrene polymers. <4> A mobile phase with ionic conductivity gradient is used.

A: chemistry
****
Q: Question: What characteristic is true with respect to the tests referred to the criterion? 
 Options:  <0> The purpose is to describe the subject in the continuum of some trait. <1> The objective is to maximize individual differences. <2> The scores obtained only have meaning in relation to the results of the normative group. <3> They allow to interpret the scores in absolute sense, without reference to any group. <4> The items are usually derived from some feature theory.

A: psychology
****
Q: Question: Which of the following strands of DNA has the same nucleotide sequence (except the change of T for U) as its primary transcript: 
 Options:  <0> The coding strand. <1> The mold thread. <2> The leading thread. <3> The delayed strand <4> Any.

A:
chemistry
****
