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: The reaction of 1H-indole with electrophiles takes place selectively on the atom in position: 
 Options:  <0> one. <1> two. <2> 3. <3> Four. <4> 5.
[EX A]: chemistry

[EX Q]: Question: Among other properties with respect to hypericin we can indicate: 
 Options:  <0> It is a powerful hepatoprotector extracted from the roots of Hypericum perforatum. <1> It is a powerful cholagogue that is extracted from the resin of the Hypericum perforatum rhizome. <2> It is a removable antiretroviral of the aerial parts of Hypericum perforatum. <3> It is a laxative that is extracted from the leaves of Hypericum perforatum. <4> It is a potent hepatoprotective present in the fruits of Hypericum perforatum.
[EX A]: pharmacology

[EX Q]: Question: One of the following answers is FALSE regarding breast cancer. 
 Options:  <0> The majority of tumors (70%) have receptors for hormones. <1> The stage measured according to the TNM system is one of the prognostic factors of the disease. <2> The presence of axillary adenopathies contraindicates breast surgery. <3> Anthracyclines and taxanes are the chemotherapeutic agents most used in the complementary treatment. <4> The breast-conserving surgery associated with radiotherapy has comparable results to mastectomy.
[EX A]:
medicine