TASK DEFINITION: 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.
PROBLEM: Question: The content validity of an evaluation instrument refers to: 
 Options:  <0> The evidence obtained by factor analysis. <1> The concurrence of measures. <2> The adequacy in the establishment of inferences. <3> The relevance and representativeness of its items. <4> The significant relationships with other measures.

SOLUTION: psychology

PROBLEM: Question: Polarography is an analytical technique that refers to: 
 Options:  <0> The absorption of electromagnetic radiation. <1> The emission of electromagnetic radiation. <2> The voltametry with mercury electrode. <3> The use of palladium as a reference electrode. <4> To the potential of asymmetry.

SOLUTION: chemistry

PROBLEM: Question: The reaction of bromine and cyclopentene leads to the production of 1,2-dibromocyclopentane by a mechanism: 
 Options:  <0> Of anti addition. <1> Of addition syn. <2> Substitution SN1. <3> Substitution SN2. <4> Of elimination.

SOLUTION:
pharmacology