Anatomy A 45 year old lady is having persistent reflux symptoms. Most accurate investigation in establishing the diagnosis before surgical treatment is A An UGI series B Endoscopy C Esophageal manometry D 24 hours pH monitoring 💡 Explanation A 45 year old lady is having persistent reflux symptoms. Most accurate investigation in establishing the diagnosis before surgical treatment is ✓ Correct Answer: D. 24 hours pH monitoring