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: 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.

A: chemistry
****
Q: Question: The epithelium of the epidermis is: 
 Options:  <0> Stratified keratinized plane. <1> Stratified non-keratinized plane. <2> Simple keratinized cylindrical. <3> Keratinized stratified cylindrical. <4> Cubic stratified.

A: biology
****
Q: Question: In the compression process occurs: 
 Options:  <0> An aggregation of the powder to be compressed. <1> A decrease in porosity. <2> A decrease in interparticular contact. <3> An increase in porosity. <4> An unpacking of the particles.

A:
pharmacology
****