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: It allows to compare proportions of two independent samples the statistical test:
Options: <1> From McNemar. <2> Of Snedecor. <3> Of the median. <4> Exact Fisher. <5> U of Mann-Whitney.

Output: 4

Input: Consider Input: Question: Acetylation of histones affects transcription:
Options: <1> Blocking the incorporation of other components of the transcription machinery. <2> Preventing the remodeling of chromatin. <3> Facilitating the action of helicases. <4> Decreasing sensitivity to nuclear receptors. <5> Reducing the affinity of histones for DNA.

Output: 5

Input: Consider Input: Question: In the human eye:
Options: <1> Photoreceptors contact the vitreous humor. <2> The accommodation is due to the increase in the curvature of the cornea. <3> The pigmentary epithelium participates in the regeneration of rhodopsin. <4> The cones and rods are distributed homogeneously throughout the retina. <5> The greatest refractive power is in the lens.
Output: 3