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: Regarding intestinal polyposis, which of the following syndromes is NOT hereditary? 
 Options:  <1> Gardner syndrome. <2> Cronkhite-Canada syndrome. <3> Turcot syndrome. <4> Juvenile polyposis <5> Peutz-Jeghers syndrome.
[A]: 2


[Q]: Question: The demographic dynamics of a community is determined by: 
 Options:  <1> Natality <2> Mortality. <3> Immigration. <4> Emigration. <5> All are correct.
[A]: 5


[Q]: Question: The type of epidemiological study indicated to evaluate, in a population initially exempt from the health problem under study, the association between a risk factor and the onset of the disease is: 
 Options:  <1> Randomized clinical trial. <2> Quasi experimental. <3> Ecological studies <4> Cases and controls study. <5> Cohort study.
[A]:
3