Pediatrics The Gold standard investigation for Gastro-Oesophageal reflux disease is: A Endoscopy B 24 hour esophageal pH recording C Oesophageal manometry D Measurement of length of lower oesophageal sphincter 💡 Explanation The Gold standard investigation for Gastro-Oesophageal reflux disease is: ✓ Correct Answer: B. 24 hour esophageal pH recording