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'.

[EX Q]: Question: A 47-year-old man consulted for edema in lower limbs of 3 weeks of evolution. In blood analysis, creatinine 1.3 mg / dL, total cholesterol 270 mg / dL and albumin 2.4 g / dL. In the urine sediment, it presents 15-20 red cells per field and in urine of 24 hours proteinuria is detected 3.7 g / day. What is the most likely diagnosis? 
 Options:  <1> Minimal change disease. <2> Focal and segmental glomerulosclerosis. <3> Membranous nephropathy <4> Membranoproliferative glomerulonephritis type I. <5> Mesangial proliferative glomerulonephritis.
[EX A]: 3

[EX Q]: Question: Ferrous oxide, known as wustite (FeO) is non-stoichiometric because it contains: 
 Options:  <1> Excess iron <2> Oxygen excess <3> Iron defect. <4> Oxygen defect. <5> Defect of iron and oxygen.
[EX A]: 3

[EX Q]: Question: The black indicator of Eriochrome T (N.E.T.) has the following colors depending on the pH: 
 Options:  <1> H2In¯rojo, HIn2- blue, In3- orange and when complexed with metal it is red. <2> H2In¯azul, HIn2- red, In3- orange and when complexed with metal it is red. <3> H2In¯rojo, HIn2- blue, In3- red wine and when complexed with metal it is orange. <4> H2In-red, HIn2- orange, In3- blue and when complexed with metal it is orange. <5> H2In¯azul, HIn2- orange, In3- red and when complexed with metal is orange.
[EX A]:
1