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': "60-year-old male with history of dysphagia can take liquid only and history of smoking and weight loss. Diagnosis is: \nSelect and explain. \nA. Achalasia cardia, B. Barret's esophagus, C. Carcinoma esophagus, D. Corrosive", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Carcinoma EsophagusRef: Bailey and Love 26th Edition, Page 1006* Most common cause of rapid progressive dysphagia and weight loss in carcinoma', 'role': 'assistant'}]