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': 'True about gastric lymphoma -a) Non Hodgkins lymphoma commonest varietyb) Diagnosis is made by biopsyc) Chemoresistantd) Essentially B-cell typee) H-Pylori has direct relationship \nSelect and explain. \nA. abde, B. bcde, C. acde, D. ade', 'role': 'user'}, {'content': "Answer: A \nExplanation: Gastric lymphoma\n\nThe stomach is the most common site for extranodal lymphoma.\nNearly all gastric lymphomas are\xa0B-cell lymphomas of mucosa-associated lymphoid tissue (MALT lymphoma)\nMajority of cases (80%) are associated with\xa0chronic gastritis and H. Pylori infection.\nThe most striking evidence linking H. Pylori gastritis to MALToma is that eradication of infection by antibiotics induces durable remission with low rate of recurrence.\nGastric lymphoma represents 5% of all gastric malignancies.\nIt is most prevalent is\xa0sixth decade\xa0of life.\nLike other tumors of mature B cells, MALTomas express B-cell markers\xa0CD 19 and CD 20.\xa0They do not express CD 5, CD 10 and CD 23.\nDiagnosis is made by endoscopic biopsy.\nGastric lymphomas are\xa0chemosensitive\xa0and chemotherapy alone or along with surgery is used for the treatment of\xa0gastric lymphoma.\n\nAbout option 'a'\n\nMost common variety of gastric lymphoma is NHL (MALToma). Very rarely, Hodgkin's lymphoma may also occur in stomach.", 'role': 'assistant'}]