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: Derived from blood monocytes: 
 Options:  <0> Protoplasmic astrocyte. <1> Fibrous astrocyte. <2> Oligodendrocyte <3> Microgliocyte <4> Satellite cell.
biology

Question: The diagnosis of sarcoidosis is based on: 
 Options:  <0> Clinical-radiological compatible picture and presence of non-caseating granulomas in one or more organs, with negative cultures of mycobacteria and fungi. <1> Elevation of the serum level of the angiotensin conversion enzyme in a patient with a compatible clinical-radiological picture. <2> Characteristic radiological findings in high-resolution computed tomography of the chest in a patient with clinical suspicion. <3> Presence of lymphocytic alveolitis with predominance of CD4 + lymphocytes in bronchoalveolar lavage in a patient with a compatible clinical-radiological picture. <4> Finding of granulomatous cellularity in a fine needle aspiration puncture (FNAP) of an affected organ in a patient with a compatible clinical-radiological picture.
medicine

Question: What is a prodrug? 
 Options:  <0> A drug of series of a therapeutic class. <1> A drug that has been withdrawn from the market. <2> An inactive product that is enzymatically converted to an active drug. <3> A compound of natural origin from which one or more drugs are obtained by hemisynthesis. <4> A drug that lacks activity but enhances the action of others.

medicine