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 differential modification of RNA: 
 Options:  <1> It can result in multiple products from one gene. <2> It occurs thanks to the transcription bubble. <3> It is catalyzed by RNA polymerase I. <4> It is catalyzed by RNA polymerase II. <5> It is catalyzed by RNA polymerase III.
[EX A]: 1

[EX Q]: Question: The set of means and systems that facilitate the contact of the infectious agent with the recipient subject corresponds to: 
 Options:  <1> Source of infection. <2> Habitat. <3> Transmission mechanism. <4> Biotope <5> Reservoir.
[EX A]: 3

[EX Q]: Question: The Program of Preventive Activities and Health Promotion (PAPPS) DOES NOT include as a minimum package in the Infant Subprogram: 
 Options:  <1> Screening for congenital hypothyroidism. <2> Promotion of breastfeeding. <3> Prevention of pregnancy and sexually transmitted diseases in adolescents. <4> Prevention of suicide. <5> Prevention of active and passive smoking.
[EX A]:
4