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: The integral psychological therapy (IPT) of Brenner et al. (1992) consists of different subprograms. Which of these subprograms does NOT belong to such therapy ?: 
 Options:  <1> Cognitive differentiation <2> Solution of interpersonal problems. <3> Social perception. <4> Social skills. <5> Management and control of stress.

Output: 5


Input: Consider Input: Question: In the β-oxidation of odd-chain fatty acids, what is the molecule that forms with the last three carbons to enter the citric acid cycle ?: 
 Options:  <1> Propionyl-CoA. <2> Methylmalonyl-CoA. <3> Succinyl-CoA. <4> Succinate <5> Malate.


Output: 3