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: 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.

Output: 2


Input: Consider Input: Question: Friedel-Crafts alkylation reactions lead to products that: 
 Options:  <1> They facilitate diazotization reactions. <2> They facilitate the reactions of formation of ethers. <3> Activate the aromatic ring against other substitutions. <4> They deactivate the aromatic ring against other substitutions. <5> None of the above.

Output: 3


Input: Consider Input: Question: In which of the following anxiety disorders is considered that there is no pharmacological treatment of choice? 
 Options:  <1> Obsessive-compulsive disorder <2> Panic disorder (anguish disorder). <3> Social phobia. <4> Specific phobia. <5> Post-traumatic stress disorder.


Output: 4