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 is the main risk factor in the appearance of ischemic or hemorrhagic ICTUS?
Options: <1> Cardiopathy <2> Mellitus diabetes. <3> Hyperlipidemia <4> Arterial hypertension. <5> Obesity.
[EX A]: 4

[EX Q]: Question: An increase in blood pressure between 80 and 150 mmHg increases diuresis because:
Options: <1> The glomerular filtration increases exponentially. <2> Decreases the peritubular reabsorption of water. <3> The efferent arteriole contracts. <4> Proportionally increases renal blood flow. <5> The afferent arteriole contracts.
[EX A]: 2

[EX Q]: Question: To calculate the number of different genotypes in any allelic series the formula is applied:
Options: <1> (n-1) / 2. <2> n x (n + 1) / 2. <3> n x (n-1) / 2. <4> (n-1) x (n + 1) / 2. <5> (2n-1) / 2.
[EX A]:
2