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: Surgery
[{'content': "Esophageal carcinoma is not predisposed by - \nSelect and explain. \nA. Achalasia, B. Scleroderma, C. Corrosive intake, D. Barret's esophagus", 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer is 'b' i.e. Scleroderma", 'role': 'assistant'}]