This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Haemophilus, Yersinia, Spirochaetes, Ricketssia, Chlamydia, Mycoplasma and Miscellaneous Bacteria), Subject name: Microbiology
[{'content': 'Helicobacter pylori is not associated with:- \nSelect and explain. \nA. Gastrointestinal lymphoma, B. Gastric cancer, C. Gastric leiomyoma, D. Peptic ulcer', 'role': 'user'}, {'content': "Answer: C \nExplanation: Helicobacter pylori is associated with: Acute gastritis Peptic ulcer disease Chronic atrophic gastritis Autoimmune gastritis Promotes pernicious anemia Adenocarcinoma of stomach Non-Hodgkin's gastric lymphoma.", 'role': 'assistant'}]