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: Liquid chromatography using linked stationary phases can be divided into normal phase and reverse phase phases. In this context it can be said that: 
 Options:  <0> The main separation mechanism in reverse phase is the distribution, while adsorption also plays a very important role in the normal phase. <1> In normal phase chromatography, a large number of non-polar stationary phases can be used. <2> The main separation mechanism in normal phase is the distribution, while the adsorption plays a very important role in the reverse phase. <3> In reverse phase chromatography, the stationary phase is polar and the non-polar eluents. <4> In reverse phase chromatography, a large number of polar stationary phases can be used.

SOLUTION: chemistry

PROBLEM: Question: A patient with an internal arteriovenous fistula in the left arm will recommend: 
 Options:  <0> Put on a compressive bandage for protection. <1> Perform elbow flexion and extension exercises to activate their maturation. <2> Feel the fistula daily to check that it works. <3> Clean the surrounding skin with an antiseptic every day. <4> Lift weight with that hand to achieve vascular remodeling.

SOLUTION: nursery

PROBLEM: Question: Which process is not related to a proton gradient ?: 
 Options:  <0> Oxidative phosphorylation <1> Synthesis of NADPH. <2> Glucolysis <3> Heat production <4> Active transport.

SOLUTION:
chemistry