A 48-year-old man is diagnosed with a duodenal ulcer associated with positive Helicobacter pylori testing. He has no significant drug allergies. According to Australian recommendations, what is the most appropriate first-line eradication regimen?AProton pump inhibitor plus amoxycillin and clarithromycin for 7-14 daysBProton pump inhibitor plus metronidazole alone for 3 daysCProton pump inhibitor plus ciprofloxacin and metronidazole for 7 daysDAmoxycillin and clarithromycin without proton pump inhibitorEBismuth alone for 14 daysCheck my answer