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: 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.
2

Question: A 55-year-old woman with adrenal insufficiency has been prescribed corticosteroid treatment. Which of the following instructions would you provide in relation to this treatment? 
 Options:  <1> Take the drug first thing in the morning. <2> Take the drug before bedtime. <3> Exclude foods rich in calcium and vitamin D from the diet. <4> Eat a diet low in calories and protein. <5> Monitor the decrease in blood pressure.
1

Question: What is the main cause of functional urinary incontinence in the elderly? 
 Options:  <1> Detrusor instability. <2> Obstruction due to fecalomas. <3> Laxity of the muscles of the pelvic floor. <4> Environmental barriers. <5> Urinary retention induced by medication.

4