TASK DEFINITION: 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.
PROBLEM: 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.

SOLUTION: pharmacology

PROBLEM: Question: The diagnosis of sarcoidosis is based on: 
 Options:  <0> Clinical-radiological compatible picture and presence of non-caseating granulomas in one or more organs, with negative cultures of mycobacteria and fungi. <1> Elevation of the serum level of the angiotensin conversion enzyme in a patient with a compatible clinical-radiological picture. <2> Characteristic radiological findings in high-resolution computed tomography of the chest in a patient with clinical suspicion. <3> Presence of lymphocytic alveolitis with predominance of CD4 + lymphocytes in bronchoalveolar lavage in a patient with a compatible clinical-radiological picture. <4> Finding of granulomatous cellularity in a fine needle aspiration puncture (FNAP) of an affected organ in a patient with a compatible clinical-radiological picture.

SOLUTION: medicine

PROBLEM: Question: Which of the following nutrients requires more special attention and recommendation in later life? 
 Options:  <0> Selenium. <1> Calcium. <2> Essential amino acids. <3> Lipids <4> Fiber.

SOLUTION:
nursery