In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

[Q]: Question: A key reaction in the regulation of gene expression is acetylation / desatethylation in the histones of some of its residues:
Options: <1> Serina <2> Threonine <3> Lysine <4> Tryptophan <5> To the girl.
[A]: 3

[Q]: Question: They are directly involved in allergic reactions:
Options: <1> T lymphocytes. <2> Dendritic cells <3> Monocytes <4> Platelets. <5> Mastocytes
[A]: 5

[Q]: Question: Persuasion is a way to change attitudes. Which of the following statements is NOT correct ?:
Options: <1> The source that communicates a message must be credible, attractive, close and related. <2> The positive message persuades better than the negative or the neutral. <3> Positive states of mind favor persuasion more than neutral states. <4> The attitudes of people with high cognitive need are more difficult to modify especially if weak arguments are used. <5> The recipient's self-esteem does not influence persuasion.
[A]:
5