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 relationship between turbidimetry and nephelometry? 
 Options:  <1> Nephelometry is the inverse of turbidimetry. <2> Turbidimetry is more sensitive than nephelometry. <3> Nephelometry can be measured with a conventional spectrophotometer. <4> Both technologies measure the dispersion of light. <5> Both technologies are the most sensitive and used in clinical laboratories.
[EX A]: 4

[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: We can consider an antecedent of the cognitive dynamic evaluation the work of: 
 Options:  <1> Thorndike (1974-1949). <2> Binet (1927). <3> Vygotsky (1935). <4> Kelly (1955). <5> Weschler (1967).
[EX A]:
3