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: The goblet cells belong to the tissue: 
 Options:  <0> Epithelial. <1> Conjunctive. <2> Cartilaginous. <3> Osseous. <4> Adipose.
[A]: biology


[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


[Q]: Question: What does it mean that hemoglobin binds O2 cooperatively? 
 Options:  <0> That the binding of an O2 molecule to a subunit of hemoglobin drives the binding of other subunits to form a complete protein hemoglobin. <1> That the binding of an O2 molecule to a subunit of hemoglobin increases the affinity of the same subunit to bind more O2 molecules. <2> That the binding of an O2 molecule to a subunit of hemoglobin increases the affinity of other subunits for O2. <3> That the union of an O2 molecule to a protein hemoglobin causes the union of another O2 molecule to another protein different hemoglobin. <4> None of this is true.
[A]:
chemistry