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'.

Question: A patient with peripheral occlusive arteriopathy who presents intermittent claudication will be recommended: 
 Options:  <1> Absolute rest to reduce the demands of O2. <2> Elevate the legs to reduce pain. <3> Apply dry heat to the legs to promote vasodilation. <4> Walk on flat surfaces. <5> Use gradual compression stockings.
4

Question: In relation to the physiology of the complement system, one of the following statements is false: 
 Options:  <1> Most of its components are inactive. <2> Its mode of activation is similar to the coagulation cascade. <3> It is subject to strict control of regulatory mechanisms. <4> It is only activated by two different routes: the classical and the alternative. <5> During its activation, multimolecular complexes are formed.
4

Question: What values ​​obtained in an arterial blood gas are considered within the normal parameters in an adult person ?: 
 Options:  <1> PaCO2 65mmHg, PaO2 80mmHg, pH 7.55. <2> PaCO2 35mmHg, PaO2 110mmHg, pH 7.55. <3> PaCO2 35mmHg, PaO2 90mmHg, pH 7.35. <4> PaCO2 80mmHg, PaO2 35mmHg, pH 7.35. <5> PaCO2 20mmHg, PaO2 90mmHg, pH 7.45.

3