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
****
Q: Question: In mammals, Toll-like receptors (TLRs) are receptors: 
 Options:  <1> Signaling. <2> Antigenic <3> Of histocompatibility alleles. <4> Of phagocytosis. <5> Of chemokines.

A: 1
****
Q: Question: Iron deficiency anemia is treated with oral or parenteral preparations: 
 Options:  <1> Only ferrous salts should be used orally. <2> Only ferric salts should be used orally. <3> Orally, the most appropriate form is the iron-dextran complex. <4> Orally, the treatment should last a maximum of fifteen days. <5> Only ferrous salts should be used parenterally.

A:
1
****