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: Osmium oxide (VIII), OsO4: 
 Options:  <0> It is a compound in a state of oxidation very common among transition metals. <1> It is the only binary compound of osmium with oxygen. <2> It has the structure of rhenium trioxide. <3> It is inert compared to alkaline hydroxides. <4> It is used as an oxidant in organic chemistry.
chemistry

Question: When using the Callista Roy model in practice, the organization of the factors that influence the person's responses are grouped as stimuli: 
 Options:  <0> Innatos and acquired. <1> Adaptive and ineffective <2> Focal, contextual and residual. <3> Internal and external. <4> Physiological, psychological and sociocultural.
nursery

Question: If, by adding a drop of H2O2 to a bacterial suspension, bubbles (O2) are generated, the bacteria produce: 
 Options:  <0> Cytochrome C oxidase. <1> Oxygenase <2> Superoxide dismutase. <3> Catalase <4> Anhydrase

biology