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: Which of the following characteristics defines an endogenous depression? 
 Options:  <1> Its course is continuous. <2> There is an evening worsening. <3> There is an early awakening. <4> There is a good response to placebo. <5> A neurotic personality intervenes in the etiopathogenesis.
[A]: 3


[Q]: Question: Which of the following molecules has the highest number of antibonding electrons? 
 Options:  <1> B2. <2> N 2 <3> Li2. <4> F 2 <5> O 2
[A]: 4


[Q]: Question: The virion of retroviruses: 
 Options:  <1> It has helical shape. <2> It has an icosahedral form. <3> It contains a single copy of its genome. <4> It contains two copies of its genome. <5> It contains a segmented genome.
[A]:
4