This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': "Dohlman's procedure is used in \nSelect and explain. \nA. Rectal prolapsed, B. Esophageal achalasia, C. CA oesophagus, D. Zenker's diveiculum", 'role': 'user'}, {'content': "Answer: D \nExplanation: Zenker's diveiculum is a protrusion of mucosa through killian's dehiscence, a weak area of the posterior pharyngeal wall between thyropharyngeus (oblique fibres) and cricopharyngeus (transverse fibres ) of the inferior constrictor muscle of the pharynx. It is a pulsion diveiculum. Dohlman's approach is minially invasive endoscopic technique wherein pouch is excised using double lipped endoscopy. Cautery or laser is used. It is a quicker procedure with shoer duration of anaesthesia and faster recovery. Reference : page 433-34 SRB's manual of surgery 5th edition", 'role': 'assistant'}]