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 a three-point test crossover study, a negative interference indicates that:
Options: <0> More double crossings have occurred than expected. <1> There have been fewer double crossings than expected. <2> The match coefficient is less than 1. <3> A simple crossover decreases the likelihood of a double crossover occurring. <4> There have been fewer simple cross-links than expected.
[A]: biology

[Q]: Question: In relation to classical congenital adrenal hyperplasia indicate the correct answer:
Options: <0> The lack of treatment causes a progressive postnatal virilization. <1> For the diagnosis, a stimulation test with ACTH is necessary. <2> In the male sex, the external genitalia are ambiguous at birth. <3> In the female sex, the external genitalia are normal at birth. <4> Prenatal treatment with glucocorticoids prevents the disease.
[A]: medicine

[Q]: Question: Benzodiazepines reduce anxiety because they work as:
Options: <0> Antagonists of GABA receptors. <1> GABA receptor agonists. <2> Antagonist of noradrenergic receptors. <3> Noradrenergic receptor agonist. <4> Antagonists of serotonergic receptors.
[A]:
psychology