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: The Latin square designs are a type of:
Options: <0> Random designs. <1> Block designs. <2> Intra-subject designs. <3> Mixed designs <4> Unifactorial designs.
[A]: psychology

[Q]: Question: Acetylation of histones affects transcription:
Options: <0> Blocking the incorporation of other components of the transcription machinery. <1> Preventing the remodeling of chromatin. <2> Facilitating the action of helicases. <3> Decreasing sensitivity to nuclear receptors. <4> Reducing the affinity of histones for DNA.
[A]: chemistry

[Q]: Question: In the history of the Psychological Evaluation, the Aristotelian Physiognomy makes its influence felt in the later works of the authors:
Options: <0> Krestschmer and Sheldon. <1> Binet and Simon. <2> Discards <3> Juan Huarte from SAN. Juan. <4> Hermann Rorschach.
[A]:
psychology