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'.

Example Input: Question: What studies should be performed in an adenocarcinoma with prominent mucinous differentiation of ascending colon diagnosed in a 32-year-old man? 
 Options:  <1> Reorganization of the MYC gene. <2> Analysis of microsatellite instability. <3> Study of mutations of the RET gene. <4> Study of BRCA1-2 mutations. <5> Studies of TP53 mutations.
Example Output: 2

Example Input: Question: It is characteristic of the alpha helix: 
 Options:  <1> Present 3.6 amino acid residues per turn. <2> Be levorotatory <3> Be stabilized by intrachain disulfide bridges. <4> Present ionic bonds between amino and ketone groups loaded with peptide bonds. <5> Have the side chains of the amino acids inwards.
Example Output: 1

Example Input: Question: Indicate which of the following statements about dead space of the airway is correct: 
 Options:  <1> It is the air that occupies the airway and is used in the exchange of gases. <2> In an adult person it is about 3250 ml. <3> In each respiratory cycle the air from the dead space is poor in O2. <4> It is the lung area that is not ventilated and therefore does not contain gases. <5> It includes airways and alveoli that do not participate in the exchange of gas with blood.
Example Output:
5