Best investigation for Zenker's diverticulum is:
Ans. (a) Barium swallowRef: Sabiston 20th Edition, Page 1020-1022* IOC for Zenker's - Barium swallow* IOC for Achalasia - Manometry* IOC for Barret's - Endoscopic biopsy
Barium swallow
Endoscopy
CECT
EUS
Oesophagus