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 anatomical dead space: 
 Options:  <0> It is always greater than the physiological one. <1> Secret surfactants. <2> Includes medium-sized bronchioles. <3> It allows gaseous exchange. <4> Includes the volume of inspiratory reserve.
[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: The most frequent cause of irreversible blindness in people over 60 is: 
 Options:  <0> Macular degeneration <1> Open angle glaucoma. <2> Diabetic retinopathy <3> Acute glaucoma. <4> Retinal detachment.
[A]:
nursery