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: Isopropyl alcohol is prepared from petroleum by hydration of: 
 Options:  <1> Isobutene <2> Eteno <3> Penteno <4> Buteno. <5> Propene
5

Question: Regarding gastroesophageal reflux disease, which of the following statements is true? 
 Options:  <1> The intensity and frequency of heartburn has little relationship with the presence and severity of endoscopic esophagitis. <2> Most patients with gastroesophageal reflux disease have esophagitis at endoscopy. <3> Treatment with proton pump inhibitors usually achieves good control of symptoms but is not superior to placebo in the endoscopic cure of esophagitis. <4> Barrett's esophagus can progress to low-grade epithelial dysplasia, high-grade epithelial dysplasia, and finally squamous cell carcinoma of the esophagus. <5> Endoscopic screening and surveillance programs have unequivocally shown to be able to reduce mortality in patients with Barrett's esophagus.
1

Question: The vaginal microbiota of a healthy fertile woman is dominated by bacteria of the genus: 
 Options:  <1> Peptostreptococcus <2> Bifidobacterium <3> Eubacterium. <4> Lactobacillus <5> Vagococcus

4