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: In relation to the hearing and balance processes, indicate which statement is correct:
Options: <1> The sounds are perceived in the organ of Corti and the balance in ampullary crests and maculae. <2> The auditory signal is processed in the cerebellum. <3> The inner ear is full of air. <4> Otoliths are composed of quartz. <5> All answers are false.
[EX A]: 1

[EX Q]: Question: When administering oxygen therapy to a patient admitted to the emergency room due to exacerbated COPD, you should take into account that:
Options: <1> The flow of oxygen must be high, since respiratory failure is accompanied by hypoxia. <2> The concentration of oxygen is conditioned by the patient's clinical situation. <3> The concentration of oxygen must be equal to the atmospheric concentration, since the patient presents hypercapnia. <4> The flow should be low, since hypoxia is the only stimulus to breathe. <5> The flow must be adjusted to achieve a PO2 greater than 90 mmHg.
[EX A]: 4

[EX Q]: Question: Reva Rubin identifies maternal behavior after delivery in three stages:
Options: <1> Acceptance, Support and Abandonment. <2> Acceptance, Denial and Encounter. <3> Denial, Affirmation and Dependency. <4> Affirmation, Affirmation and Support. <5> Coping, Dependence and Help.
[EX A]:
1