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: 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: Question linked to image nº15 A 67-year-old patient who reported a decrease in unilateral visual acuity and rapidly evolving metamorphopsia. The attached retinography presents the image of the affected eye. The most likely diagnosis would be: 
 Options:  <1> Macular degeneration associated with exudative age. <2> Retinal detachment. <3> Retinitis pigmentosa <4> Central vein thrombosis of the ischemic retina. <5> Equatorial choroidal melanoma.
1

Question: Ultraviolet radiation changes the structure of DNA by: 
 Options:  <1> Rupture of phosphodiester bonds. <2> Deamination of nitrogenous bases. <3> Depurinization <4> Formation of cyclobutyl rings of pyrimidines. <5> Hydroxylation of nitrogenous bases.

4