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 reovirus .: 
 Options:  <1> They are released from the cell by budding. <2> They replicate their genetic material in the cell nucleus. <3> They have a lipid envelope. <4> They form virions resistant to acid pH. <5> They are transmitted by blood.
[EX A]: 4

[EX Q]: Question: The type of epidemiological study indicated to evaluate, in a population initially exempt from the health problem under study, the association between a risk factor and the onset of the disease is: 
 Options:  <1> Randomized clinical trial. <2> Quasi experimental. <3> Ecological studies <4> Cases and controls study. <5> Cohort study.
[EX A]: 3

[EX Q]: Question: In 1916, in the House of Health of Santa Cristina in Madrid, the Regulation was approved for the first: 
 Options:  <1> School of Midwives of Spain. <2> School of Military Nurses. <3> Royal Certificate of Ministers. <4> Collegiate of Surgeons and Bleeders. <5> Board of Nursing Training Board.
[EX A]:
1