instruction:
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'.
question:
Question: The water used in the preparation of medicated syrups must: 
 Options:  <1> Be sterile <2> Be purified or distilled water. <3> It is highly recommended that it contain dissolved carbon dioxide. <4> Contain dissolved calcium ions. <5> Contain an adequate proportion of magnesium ions.
answer:
2


question:
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.
answer:
5


question:
Question: The activation energy of a reaction: 
 Options:  <1> It is not modified by the action of enzymes. <2> It is the energy necessary to reach the state of transition. <3> It is lower than the energy of the substrates. <4> It is lower than the energy of the products. <5> It is an average of the value of ΔG of the reaction.
answer:

2