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: They are reservoirs of Q fever (Coxiella burnetti): 
 Options:  <1> Bats <2> Poultry. <3> Rodents <4> Dogs. <5> Cows, sheep and goats.

A: 5
****
Q: Question: The Baeyer-Villiger oxidation is an important procedure to transform ketones into: 
 Options:  <1> Acids <2> Aldehydes. <3> Esters. <4> Ethers <5> Alquenos

A:
3
****