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'.

[Q]: Question: In the determination of water hardness due to the presence of Ca2 + and Mg2 + ions, the titrant reagent is used:
Options: <1> Methyl orange. <2> A standard solution of potassium chloride. <3> Black Eriochrome T. <4> A standard solution of ethylenediaminetetraacetic acid (EDTA). <5> A solution of AEDT previously standardized against a solution of potassium phthalate.
[A]: 4

[Q]: Question: On the link between the nitrogenous base and the ribose of the nucleotides:
Options: <1> The anomeric carbon of ribose is in alpha configuration. <2> It is an N-glycosidic bond. <3> It involves the C5' of the ribose. <4> It involves phosphate groups. <5> It is of a different nature for each nitrogenous base.
[A]: 2

[Q]: Question: The alteration of the reading process in which the global recognition of the words is affected, being preserved the ability to recognize the letters of the words, is called:
Options: <1> Direct dyslexia <2> Phonological dyslexia <3> Superficial dyslexia <4> Alexia pure. <5> Alexia anomic.
[A]:
3