This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: Surgery
[{'content': "Upper GI endoscopy is indicated in all, except: \nSelect and explain. \nA. Peptic ulceration, B. Achalasia cardia, C. Barrett's esophagus, D. Corrosive ingestion delayed phase", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (d) Corrosive ingestion delayed phaseRef: Bailey and Love 26th Edition, Page 994* For corrosive ingestion endoscopy must be planned in early; phase within 48 hours* Endoscopy beyond 48 hours has more chances of perforation* Achalasia cases before endoscopy must be aspirated by Ryles tube in mediastinum', 'role': 'assistant'}]