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: Given three DNA molecules of the same length (A, B and C) and in the same solvent, but with different richness in terms of G + C content (A: 50%, B: 60%, and C: 75% ), How would your melting temperatures (Tm) be ?: 
 Options:  <0> A> B> C. <1> Being in the same solvent, they would be the same in all three cases. <2> The DNA molecule C would not belong to a thermophilic bacterium, given its lower Tm. <3> C> B> A. <4> You can not know with the information of the statement.

A: pharmacology
****
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: For a drug to permeate through the cornea, you must: 
 Options:  <0> Be totally ionized. <1> Present a very high polarity. <2> Join the lysozyme that is present in the tear fluid. <3> Present a certain lipophilicity and a minimum degree of water solubility. <4> Have weak acid character.

A:
pharmacology
****