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'.

Ex Input:
Question: In acute coronary syndrome with ST-segment elevation, heparin is used because:
Options: <1> It is fibrinolytic, since it destroys the thrombus. <2> It inhibits the formation of more thrombi and prevents their recurrence. <3> It inhibits platelet aggregation. <4> Restores the patency of the coronary artery immediately. <5> All the previous answers are correct.

Ex Output:
2

Ex Input:
Question: The most appropriate microscopy to identify Treponema pallidum in exudates from syphilitic lesions is:
Options: <1> Clear field without staining. <2> Clear field with simple staining. <3> Dark field <4> Phase contrast. <5> Polarized light

Ex Output:
3

Ex Input:
Question: Which of the following enzymes catalyzes phosphorylation using inorganic phosphate:
Options: <1> Hexokinase. <2> Fosfofructoquinasa. <3> Glyceraldehyde-3-phosphate dehydrogenase. <4> Phosphoglycerate kinase. <5> Pyruvate kinase.

Ex Output:
3