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': "A 50 years labourer, smoker presented with repeated episodes of epigastric pain, associated with ocassional vomiting and weight loss. What is the diagnosis \nSelect and explain. \nA. Hiatus hernia, B. Gastric ulcer, C. Gastric volvulus, D. Barret's esophagus", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Gastric ulcerSmoking with epigastric pain and vomiting with weight loss is strongly suggestive of gastric ulcer.', 'role': 'assistant'}]