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: Pathology
[{'content': "Conditions associated with an increased risk of squamous cell carcinoma of the oesophagus include all of the following except - \nSelect and explain. \nA. Barrett's Oesophagus, B. Achalasia cardia, C. Smoking, D. Tylosis", 'role': 'user'}, {'content': "Answer: A \nExplanation: Barret's esophagus predisposes to adenocarcinoma.", 'role': 'assistant'}]