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: A patient with an internal arteriovenous fistula in the left arm will recommend: 
 Options:  <0> Put on a compressive bandage for protection. <1> Perform elbow flexion and extension exercises to activate their maturation. <2> Feel the fistula daily to check that it works. <3> Clean the surrounding skin with an antiseptic every day. <4> Lift weight with that hand to achieve vascular remodeling.
[A]: nursery


[Q]: Question: How are the proteins involved in the DNA curl and compaction called ?: 
 Options:  <0> Kinases <1> Topoisomerases <2> Histones. <3> Phosphatases <4> DNA nucleases
[A]: chemistry


[Q]: Question: Transcription factors: 
 Options:  <0> They bind to chromatin by interaction with histone H2A. <1> They bind to RNA and regulate the start of transcription. <2> They join the DNA. <3> They are organized into nucleosomes. <4> They regulate DNA mutilation.
[A]:
chemistry