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: The alkali halides, MX: 
 Options:  <1> They are solids that melt below 100ºC. <2> They form crystals of intense colors. <3> They can be obtained by reaction of the M2CO3 carbonates with the aqueous solutions of the HX hydrogen halides. <4> None of them can be found in nature. <5> They are liquid at room temperature.
[A]: 3


[Q]: Question: Question linked to image # 12 What is the most reasonable attitude at this time ?: 
 Options:  <1> Remove the entire catheter and reinsert it. <2> Extract about 10 cm the catheter and install the appropriate treatment. <3> Channel another central venous line through the jugular vein. <4> Leave it as it is because it can be used to monitor central venous pressure. <5> We can not use the catheter because it has perforated the vein and it is located in the lung.
[A]: 2


[Q]: Question: Among the epidemiological criteria of causality defined by Bradford Hill (1965) is NOT: 
 Options:  <1> Strength of association. <2> Temporal sequence. <3> Biological gradient <4> Cessation or reversibility effect. <5> Presence of alternative explanations.
[A]:
5