Pharmacology The gold standard for diagnosis of gastroesophageal reflux disease (GERD) is not related-surgery A Endoscopy B Barium swallow C Esophageal manometry D 24-hours pH monitoring 💡 Explanation The gold standard for diagnosis of gastroesophageal reflux disease (GERD) is not related-surgery ✓ Correct Answer: D. 24-hours pH monitoring