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.

Example Input: Question: Relating to topoisomerases:
Options: <0> They are enzymes that convert the D-amino acids into L-amino acids. <1> They are enzymes that synthesize DNA. <2> They are enzymes that participate in the union of the subunits of the ribosome. <3> They are enzymes that denature DNA. <4> DNA gyrase is a special toposiomerase.
Example Output: chemistry

Example Input: Question: A 72-year-old woman with type 2 diabetes and chronic renal failure in stage 5. If a pulmonary thromboembolism is suspected, indicate which diagnostic test would be contraindicated:
Options: <0> Transthoracic echocardiogram. <1> Pulmonary scintigraphy <2> Pulmonary angioCT. <3> Electrocardiogram. <4> Chest x-ray.
Example Output: medicine

Example Input: Question: The absorbance of a medium solution at the isosbestic point is that determined to:
Options: <0> The wavelength at which the molar absorption coefficients of two absorbent species in chemical equilibrium, interconvertible to each other, are equivalent. <1> The wavelength at which the molar absorption coefficients of two absorbing species in chemical equilibrium are not equivalent. <2> The wavelength at which the acid form of an indicator is maximum. <3> The wavelength at which the acid form of an indicator is minimal. <4> The wavelength of the species that participate in the equilibrium when it is displaced towards longer wavelengths.
Example Output:
pharmacology