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: They can be part of the B lymphocyte receptor on the cell surface: 
 Options:  <1> IgM and IgG. <2> IgD and IgG. <3> IgD and IgM. <4> IgA and IgM. <5> IgG and IgE.

Output: 3


Input: Consider Input: Question: The Arrhenius equation: 
 Options:  <1> It relates the speed of a chemical reaction with the so-called constant velocity and with the concentrations of the reactants raised to their stoichiometric coefficients. <2> It relates the constant of speed of a chemical reaction with the energy of activation of said reaction, so that if the energy, of activation is high the reaction is fast. <3> It is only fulfilled for unimolecular reactions. <4> It relates the speed constant to the temperature through the activation energy and the pre-exponential factor. <5> It allows to obtain the activation energy of an elementary reaction by only representing the decimal logarithm of the temperature versus the inverse of the reaction time.

Output: 4


Input: Consider Input: Question: What consonantal sounds of Castilian are later acquired due to their difficulty of articulation, causing a phonological disorder? 
 Options:  <1> African, liquid and nasal. <2> Fricatives, nasals and occlusives. <3> Liquids, fricatives and affricates. <4> Nasals, occlusives and affricates. <5> Occlusives, fricatives and liquids.


Output: 3