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: Histone deacetylases (HDAC) promote: 
 Options:  <0> A less condensed chromatin. <1> A weaker link between histones and DNA in nucleosomes. <2> The acetylation of lysine residues in histones. <3> That the poly (A) tail of the histone messenger RNAs be more extensive. <4> The termination of the transcription and the genetic silencing.
Example Output: pharmacology

Example Input: Question: The state of adaptation characterized by the diminution of the response to the same amount of drug or the need for a higher dose to cause the same degree of pharmacological effect, defines: 
 Options:  <0> The adaptation to a drug. <1> The route of administration. <2> Intoxication <3> Tolerance to a drug <4> Addictive behavior
Example Output: psychology

Example Input: Question: In relation to the colligative properties of a solution it can be said that: 
 Options:  <0> They have their origin in the decrease of the chemical potential of the solvent by the fact of adding a solute. <1> The decrease in the vapor pressure of the solvent to which a non-volatile solute is added is directly proportional to the mole fraction of the solvent. <2> The addition of a solute to a solvent causes the range of temperatures in which the solution is maintained in the liquid state to be lower than that corresponding to the pure solvent. <3> The molal constant of descent of the freezing point depends on the nature of the dissolved solute. <4> Cryoscopic descent is a technique applicable to the determination of the molar mass of the solvent.
Example Output:
chemistry