This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Etiological Factors of Neoplasia, Subject name: Pathology
[{'content': 'Tumors associated with organisms are all except: \nSelect and explain. \nA. Hepatocellular cancer, B. Non-small Cell Carcinoma of Lung, C. Gastric cancer, D. Nasopharyngeal cancer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tumor associated with organism: Hepatocellular carcinoma- Aspergillus Flavus (aflatoxin) Gastric Cancer- H. pylori Nasopharyngeal Cancer- EBV No organsism is associated with Non small cell carcinoma of lung.', 'role': 'assistant'}]