A 36-year-old man has dyspepsia without alarm features. Endoscopy shows a duodenal ulcer, and biopsy confirms Helicobacter pylori infection. What is the most appropriate first-line eradication regimen?AProton pump inhibitor plus Amoxicillin only for 7 daysBProton pump inhibitor plus Clarithromycin only for 7 daysCProton pump inhibitor plus Amoxicillin and Clarithromycin for 7 daysDHigh-dose proton pump inhibitor monotherapy for 4 weeksEH2 receptor antagonist plus Metronidazole for 3 daysCheck my answer