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
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Q: Question: In relation to the physiology of the complement system, one of the following statements is false: 
 Options:  <1> Most of its components are inactive. <2> Its mode of activation is similar to the coagulation cascade. <3> It is subject to strict control of regulatory mechanisms. <4> It is only activated by two different routes: the classical and the alternative. <5> During its activation, multimolecular complexes are formed.

A: 4
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Q: Question: Olive oil has the following nutrients in its composition, EXCEPT: 
 Options:  <1> Cholesterol. <2> Oleic acid. <3> Antioxidants <4> Vitamin E. <5> Linoleic acid.

A:
1
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