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: Legionella pneumophila is transmitted by: 
 Options:  <1> Air conditioning systems. <2> Contact between individuals. <3> Mosquito bite. <4> Contaminated food. <5> Fecal-oral route.
[A]: 1


[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.
[A]: 1


[Q]: Question: Vulcanization is a chemical reaction: 
 Options:  <1> What is done in the forges. <2> Which causes crosslinking of the polymer chains. <3> That desentrecuuza the polymer chains. <4> To prepare composite materials. <5> Which leads to the development of volcanoes.
[A]:
2