instruction:
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: As to the height of the plate (H) in a column chromatographic separation it can be said that: 
 Options:  <0> It is inversely proportional to the variance (standard deviation of the band). <1> It is directly proportional to the number of theoretical plates and inversely proportional to the length of the column. <2> It is directly proportional to the variance and inversely proportional to the distance traveled by the center of the band to the detector (L). <3> It is directly proportional to the variance and distance traveled by the center of the band to the detector (L). <4> It does not depend on the variance or the distance traveled by the center of the band.
answer:
pharmacology


question:
Question: The system of norms and sanctions that is established in a mandatory way for professionals based on professional ethics behaviors, is called: 
 Options:  <0> Professional bioethics <1> Practical ethics <2> Professional deontology. <3> Professional rights <4> Hierarchical moral code.
answer:
nursery


question:
Question: The cells of the seminiferous tubules that support and nourish the germ cells are: 
 Options:  <0> The cells of Leydig. <1> The Sertoli cells. <2> The primary spermatocytes. <3> Secondary spermatocytes <4> The spermatids.
answer:

biology