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.

[EX 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.
[EX A]: nursery

[EX Q]: Question: The SO2 molecule is: 
 Options:  <0> Linear, with the S atom in the center. <1> Linear, with one of the atoms of O in the center. <2> Angular, with the S atom in the center and with an angle close to 120º (equilateral triangle) and a free pair of electrons. <3> Angular, with one of the atoms of O in the center and with an angle of approximately 120º (equilateral triangle) and a pair of free electrons. <4> Angular, with the S atom in the center and with an angle close to 109º (tetrahedron) and two pairs of free electrons.
[EX A]: chemistry

[EX Q]: Question: The desmosomes: 
 Options:  <0> Communicate the cytoplasms of contiguous cells. <1> They seal the intercellular space. <2> They surround the entire cell perimeter. <3> They connect the cell to the basal lamina. <4> They are point intercellular adhesive bonds.
[EX A]:
biology