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: Sodium metal reacts violently with water because Na: 
 Options:  <1> Oxidize the water to oxygen, and the reaction is very exothermic. <2> It reduces the water to hydrogen, and the reaction is very exothermic. <3> Oxidizes the water to oxygen, and when a gas is generated, the entropy increases enormously. <4> It reduces the water to hydrogen, and the reaction is very endothermic. <5> It combines with water giving rise to an explosive hydride.
[A]: 2


[Q]: Question: In a determination of the activity of an enzyme, the depletion of the substrate: 
 Options:  <1> It is essential for most trials. <2> It may give falsely low results in sera with high enzymatic activity. <3> It occurs when the reagent is finished. <4> It occurs due to a defect in the spectrophotometer. <5> It can lead to falsely elevated results in sera with high enzymatic activity.
[A]: 2


[Q]: Question: In the clinical interview: 
 Options:  <1> The doctor has to show friend before professional. <2> The doctor should avoid warning the patient of the time available to assist him. <3> The professional must verify that the patient has understood the information. <4> It is advisable to take long breaks to avoid fatiguing the patient. <5> The doctor, during the interview, must remain standing or placed behind the head of the bed.
[A]:
3