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'.

Q: Question: Which of the following molecules has a simple covalent bond? 
 Options:  <1> C2. <2> N 2 <3> O 2 <4> O 3. <5> F 2

A: 5
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Q: 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.

A: 2
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Q: Question: The non-protein molecules that bind to the protein part of the enzyme constitute the complete enzyme are called: 
 Options:  <1> Cofactors <2> Metallic ions <3> Coenzymes. <4> Vitamins <5> Prosthetic groups.

A:
1
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