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.
--------
Question: 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.

Answer: chemistry


Question: Question: The secretion of the sebaceous glands is: 
 Options:  <0> Merocrine <1> Apocrine <2> Paracrine <3> Holocrine <4> Endocrine

Answer: biology


Question: Question: Point out the correct definition: 
 Options:  <0> The Necessary Number to Treat (NNT) is the inverse of the Relative Risk (RR). <1> The Relative Risk Reduction (RRR) can clearly differentiate the big risks and benefits of the small ones. <2> The Relative Risk Reduction (RRR) is a measure of the therapeutic effort that clinicians and patients must make to avoid negative results of their illnesses. <3> The Number Necessary to Damage (NND) is calculated by dividing the unit by the Number Needed to Treat (NNT). <4> The Absolute Risk Reduction (RRA) is calculated by the absolute difference of the episode rate in the control group minus the episode rate in the intervention group.

Answer:
medicine