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: The R-bands of human metaphase chromosomes: 
 Options:  <1> They contain DNA rich in AT pairs. <2> They have high gene density. <3> They contain poor DNA in GC pairs. <4> They replicate at the end of phase S. <5> They have low gene density.
[EX A]: 2

[EX Q]: Question: In the parasympathetic system: 
 Options:  <1> The preganglionic neuron is in thoracic spinal cord. <2> Postganglionic neurons have short axons. <3> Postganglionic fibers release noradrenaline. <4> Postganglionic neurons have muscarinic receptors. <5> Numerous neurons innervate vascular smooth muscle of the extremities.
[EX A]: 2

[EX Q]: Question: The goals that improve performance and focus people's attention are: 
 Options:  <1> General, difficult and little challenging. <2> Specific, difficult and challenging. <3> Global, easy and challenging. <4> Specific, easy and challenging. <5> Those that are imposed externally.
[EX A]:
2