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'.

Question: Clostridium perfringens can cause various infections, including:
Options: <1> The anthrax. <2> Pseudomembranous colitis. <3> The gas gangrene. <4> Tetanus <5> The syndrome of scalded skin.
3

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

Question: T. R. of 89 years, presents instability and has suffered a fall. Regarding falls in older people, it is correct that:
Options: <1> Most falls are produced by performing dangerous activities. <2> The factors that most influence the risk of falls are the intrinsic factors influenced by the underlying diseases. <3> The factors that most influence the risk of falls are those related to the changes of aging. <4> It assumes a higher risk of falling down stairs than down stairs. <5> The factors that most influence the genesis of falls in fragile elderly are the extrinsic ones.
2