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: Esters can be obtained from carboxylic acids and alcohols, by applying the Fischer esterification reaction in which: 
 Options:  <1> A base is used as a catalyst. <2> A ketone is used as the solvent. <3> A reducing reagent is used. <4> An oxidizing agent is used. <5> Acid catalysis is used.
[A]: 5


[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: A medicine produced and guaranteed by a pharmacist, or under his direction, dispensed in his pharmacy or pharmacy service, listed and described by the National Form, and intended for direct delivery to the sick to whom such pharmacy or pharmaceutical service supplies is: 
 Options:  <1> Master formula <2> Prepared office. <3> Prefabricated medication <4> Intermediate product. <5> Medical device.
[A]:
2