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: In the processing and presentation of peptides of extracellular origin intervene (n): 
 Options:  <0> The TAP proteins. <1> The tapasina. <2> The HLA-DM molecule. <3> The proteosome. <4> The HLA-B molecules.

A: biology
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Q: Question: In relation to toxoplasmosis and pregnancy, indicate which of the following options is true: 
 Options:  <0> Placental transmission to the fetus can occur. <1> The rate of antibodies should be detected at the beginning of pregnancy and, in their absence, vaccination with killed virus vaccine should be carried out. <2> The infection is less severe but more frequent the younger the pregnant woman is. <3> In our environment, the main cause of infection is the coexistence and management of domestic birds. <4> The infection occurs intrapartum, favored by the rupture of the amniotic sac.

A: nursery
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Q: Question: Acid chlorides can be transformed into carboxylic acids: 
 Options:  <0> Through a hydrolysis catalyzed by an acid or a base. <1> Through a reduction reaction with lithium aluminum hydride. <2> Through a reduction reaction with sodium borohydride. <3> Through a reduction reaction with diborane. <4> It is not possible due to the lack of reactivity that characterizes acyl halides.

A:
pharmacology
****