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: 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.
[A]: pharmacology


[Q]: Question: The INR (international normalized ratio) of a patient with chronic atrial fibrillation treated with Acenocoumarol is 4. This result indicates that: 
 Options:  <0> The appearance of ventricular arrhythmias should be controlled. <1> The patient is correctly anticoagulated. <2> Anticoagulation with heparin is more indicated. <3> There is a risk of thrombus formation. <4> Signs of bleeding should be assessed.
[A]: nursery


[Q]: Question: The covers of connective tissue that surround, protect and maintain the brain and spinal cord within the cranial cavity and the spinal canal are called meninges. Which of the following statements is correct? 
 Options:  <0> The meninges are not made up of connective tissue. <1> The pia mater adheres to the brain and spinal cord. <2> The arachnoid is the thickest and most external. <3> The dura adheres to the inner surface of the arachnoid. <4> The meninges only cover the brain.
[A]:
pharmacology