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: To detect the occurrence of prerenal acute renal failure in a patient, the nurse should monitor the presence of: 
 Options:  <1> Signs of low cardiac output. <2> Hematuria <3> Urine cloudy and smelly. <4> Colic pain <5> Elevation of creatinine clearance.

A: 1
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Q: Question: What is the main risk factor in the appearance of ischemic or hemorrhagic ICTUS? 
 Options:  <1> Cardiopathy <2> Mellitus diabetes. <3> Hyperlipidemia <4> Arterial hypertension. <5> Obesity.

A: 4
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Q: Question: They synthesize a single polyprotein precursor of all the proteins necessary for the rest of the multiplication cycle: 
 Options:  <1> Coronavirus. <2> Picornavirus <3> Rotavirus. <4> Paramyxovirus. <5> Calcivirus.

A:
2
****