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: To proceed to the elaboration of suppositories by the method of discharge it is necessary to calculate the displacement factor that indicates:
Options: <0> The weight, in grams, of drug that is displaced by one gram of excipient. <1> The volume of excipient that is displaced by 100 mL of drug. <2> The weight, in grams, of excipient that is displaced by 1mL of drug. <3> The weight, in grams, of drug that is displaced by 1 mL of excipient. <4> The weight, in grams, of excipient displaced by one gram of drug.
A:
pharmacology