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': 'Histologic examination of the lesion in stomach reveal fat-laiden cells, likely cause is : \nSelect and explain. \nA. Lymphoma, B. Postgastrectomy, C. Signet-cell carcinoma stomach, D. Atrophic gastritis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . Postgastrectomy', 'role': 'assistant'}]