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: The change of internal energy when a mole of solid is formed from gaseous ions at infinite separation, at atmospheric pressure and at 0 K is called energy: 
 Options:  <1> Deformation. <2> Of sublimation. <3> Reticular <4> Of condensation. <5> Of liquefaction.

Output: 3


Input: Consider Input: Question: The Müller cells of the retina are: 
 Options:  <1> Modified neurons. <2> Glandular <3> Neurogliales of support. <4> Of the microglia. <5> Of the pigmentary layer.

Output: 3


Input: Consider Input: Question: What does it mean that hemoglobin binds O2 cooperatively? 
 Options:  <1> That the binding of an O2 molecule to a subunit of hemoglobin drives the binding of other subunits to form a complete protein hemoglobin. <2> That the binding of an O2 molecule to a subunit of hemoglobin increases the affinity of the same subunit to bind more O2 molecules. <3> That the binding of an O2 molecule to a subunit of hemoglobin increases the affinity of other subunits for O2. <4> That the union of an O2 molecule to a protein hemoglobin causes the union of another O2 molecule to another protein different hemoglobin. <5> None of this is true.


Output: 3