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 the respiratory chain: 
 Options:  <1> Ferrosulfurized proteins contain heme groups. <2> The heme groups are in carotenoids. <3> Cytochromes contain iron and sulfur groups. <4> Ubiquinones transport protons and electrons. <5> All transporters carry two electrons.
[EX A]: 4

[EX Q]: Question: What do we mean when a doctor believes firmly in his treatment, even though controlled studies have proven ineffective, the results obtained with it will be better, his patients will be better, and will have more patients? 
 Options:  <1> The opposing process of Solomon. <2> The floor effect. <3> The Asher Paradox <4> The effect of contemplation of Prochaska. <5> The theory of the control door.
[EX A]: 3

[EX Q]: Question: The primary function of interleukin 2 (IL-2) is: 
 Options:  <1> Induce activation of macrophages. <2> Promote isotype changes in immunoglobulins produced by activated B cells. <3> Induce the synthesis of acute phase proteins by hepatocytes. <4> Promote the proliferation of T lymphocytes <5> Promote the proliferation of B lymphocytes
[EX A]:
4