This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
Motility disorders of the oesophagus are best diagnosed by - 
Select and explain. 
A. Barium meal, B. Manometry, C. Radiography, D. Endoscopy
B: Manometry
Answer: B: Manometry 
Explanation: <p>Davidson&;s principles and practice of medicine 22nd edition. *Manometry confirms the high pressure ,non relaxing lower oesophageal sphincter with poor contractility of the oesophageal body .</p>