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.

Input: Consider 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.

Output: pharmacology


Input: Consider Input: Question: Form B of DNA: 
 Options:  <0> It is formed by a double helix levorotatory with two antiparallel nucleotide chains. <1> It is wider and longer than form A. <2> It has pairs of nitrogenous bases perpendicular to the axis of the helix. <3> Corresponds to dehydrated DNA. <4> It is the minority form presented by DNA under physiological conditions.

Output: chemistry


Input: Consider Input: Question: The blastocyst is detached from the zona pellucida in: 
 Options:  <0> The ovary <1> The fallopian tube. <2> Oviductal tube. <3> The uterus. <4> The vagina


Output: biology