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: The treatment of 1-hexyne with 1 mole of hydrogen bromide results in: 
 Options:  <1> 1-bromo-1-hexene. <2> 1-bromo-2-hexene. <3> 1-bromo-3-hexene. <4> 2-bromo-1-hexene. <5> 2-bromo-2-hexene.

A: 4
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Q: Question: When performing a central peripheral insertion venous catheterization procedure, the nurse must take into account that: 
 Options:  <1> The catheter is ready for use immediately after insertion, not needing further checks. <2> It is vital to perform a chest X-ray and / or an electrocardiographic record prior to its use. <3> A complete electrocardiogram should be performed in order to avoid possible complications. <4> The location of the tip of the catheter is only checked if parenteral nutrition is to be administered through it. <5> You need to check your position using a chest x-ray and another abdomen.

A: 2
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Q: Question: The urea cycle: 
 Options:  <1> It involves the degradation of urea. <2> It was proposed by Hatch and Slack. <3> It contains a reaction that transforms citrulline into ornithine. <4> It is intimately linked to glycolysis. <5> It begins with the formation of carbamylphosphate.

A:
5
****