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: The simultaneous expression of IgM and IgD is observed for the first time in lymphocytes: 
 Options:  <0> Early Pro-B. <1> B mature. <2> Late Pro-B. <3> Pre-B. <4> B immature
answer:
biology


question:
Question: Which of the following situations would noticeably decrease the transcription of a gene? 
 Options:  <0> The presence of a repressor and an inducing molecule. <1> The binding of RNA polymerase to DNA. <2> The presence of a repressor and a correpressor molecule. <3> The presence of an activator and its signal molecule. <4> The presence of a mutated repressor that could not bind to DNA.
answer:
pharmacology


question:
Question: The ascorbic acid esters are used in Pharmaceutical Technology as: 
 Options:  <0> Reducers <1> Blockers <2> Synergists <3> Chelators <4> Antiseptics
answer:

pharmacology