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: 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.

A: 4
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Q: Question: What group of amino acids, when they are part of the proteins, can be phosphorylated? 
 Options:  <1> Val, Ser, Thr. <2> Phe, Ala, Gly. <3> Val, Glu, Asp. <4> Tyr, Ser, Thr. <5> Lys, Ser, Ile.

A: 4
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Q: Question: In choosing the type of cardiac valvular prosthesis (biological or mechanical) to be implanted in a patient, various aspects and characteristics of the patient and the prosthesis must be considered. In view of the aforementioned, point out the INCORRECT statement: 
 Options:  <1> Permanent anticoagulation is necessary in mechanical prostheses. <2> In general, biological prostheses are indicated in young patients, with long life expectancy. <3> Biological prostheses would be indicated in cases that present a formal contraindication for anticoagulation. <4> The rate of structural deterioration of a biological prosthesis is inversely proportional to the age of the subject. <5> Biological prostheses do not require permanent anticoagulation.

A:
2
****