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: 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: Ans. is 'c' i.e., Gastric leiomyoma", 'role': 'assistant'}]