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 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
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Q: Question: It has a recessive inheritance linked to the X chromosome the: 
 Options:  <0> Acatalasemia <1> Hemophilia A. <2> Rett syndrome. <3> Cystic fibrosis, <4> Hypophosphatemia

A: biology
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Q: Question: Mast cells or mast cells belong to the tissue: 
 Options:  <0> Epithelial. <1> Conjunctive. <2> Adipose <3> Lymphoid <4> Nervous.

A:
biology
****