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: Enzymatic regulation by phosphorylation: 
 Options:  <1> It is reversible. <2> It requires enzymes that directly introduce the Pi. <3> Introduce the Pi into acidic and basic amino acids. <4> Always activate enzymes. <5> It is carried out by phosphatases.
[A]: 1


[Q]: Question: The antitussive dextromethorphan is an enantiomer of the O-methylated derivative of levorphanol that belongs to the structural family of: 
 Options:  <1> 6,7-Benzomorpanos. <2> Morfinanos. <3> 4-Phenylpiperidines. <4> Phenylpropalamine. <5> Oripavinas.
[A]: 2


[Q]: Question: Mesalazine is used in therapy in the treatment of: 
 Options:  <1> Bronchial asthma in children. <2> The motion sickness. <3> The Syndrome of Gilles de la Tourette. <4> Crohn's disease <5> The hypogonadism.
[A]:
4