This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Investigation of choice for Zenker's diverticulum is – 
Select and explain. 
A. Barium swallow, B. Endo s c opy, C. Esophageal manometry, D. CT
A: Barium swallow
Answer: A: Barium swallow 
Explanation: Barium swallow is the initial ivestigation of choice for Zenker's diverticulum (pharyngeal pouch).