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'.

Input: Consider Input: 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.

Output: 3

Input: Consider Input: Question: According to the Scale of Thought Disorders, Language and Communication (Andreasen, 1979), what is the definition of Distracted Speech:
Options: <1> Answers of a longer duration than adequate and that provide little information. <2> The patient stands in the middle of a sentence or idea and changes the subject in response to immediate stimuli. <3> The patient responds obliquely, tangentially or even relevantly. <4> A pattern of spontaneous speech in which ideas slip away from each other. <5> The patient speaks quickly and it is difficult to interrupt him.

Output: 2

Input: Consider Input: Question: Synovial fluid from patients with gout often contains:
Options: <1> Hippuric acid crystals. <2> Tyrosine crystals. <3> Triple phosphate crystals. <4> Urate crystals. <5> Calcium oxalate crystals.
Output: 4