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: What does the intersessional sampling used in observation techniques refer to: 
 Options:  <1> To the registration of relevant information between sessions. <2> To the periodicity, number and criteria of start-end of the sessions. <3> To the successive rounds of observation of the subjects to observe. <4> To the temporary selection and its interval or partial modality. <5> To the record of focal events that occur between sessions.
[EX A]: 2

[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: The class I genes of the Major Histocompatibility Complex: 
 Options:  <1> They are few <2> They are very polymorphic. <3> They express their alleles according to allelic exclusion. <4> They are expressed in all the cells of the organism. <5> They code glycolipids.
[EX A]:
2