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: Reactions in which there are no intermediates are described as: 
 Options:  <1> Concerted. <2> Polar <3> Radicals <4> Homolitic <5> Heterolithic
[A]: 1


[Q]: Question: Homosexual male of 30 years of age HIV (+) who participates as a volunteer in a help center for patients with AIDS. According to her clinical history she received diphtheria toxoid (Td) 6 years ago, the MMR vaccine in childhood and adolescence, and hepatitis B three years ago. He is currently asymptomatic with a CD4 count greater than 200 cls / μl. What vaccines should we recommend? 
 Options:  <1> Seasonal influenza, pneumococcal, tetravalent meningitis and hepatitis A. <2> Seasonal flu, Td, pneumococcal and tetravalent meningitis. <3> Templavalent meningitis, pneumococcal and seasonal influenza. <4> Td, tetravalent, pneumococcal meningitis. <5> Viral triple, seasonal flu, pneumococcal.
[A]: 1


[Q]: Question: Of the following statements of the electron transport chain. Which is true ?: 
 Options:  <1> An FADH molecule can generate up to 2.5 molecules of ATP. <2> One molecule of NADH can generate up to 1.5 molecules of ATP. <3> Electrons flow from more positive reduction potentials to more negative reduction potentials. <4> Complex II (used by FADH2) does not transfer protons to the intermembrane space. <5> Complex III uses copper (Cu) atoms as cofactors.
[A]:
4