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
Tumors associated with organisms are all except: 
Select and explain. 
A. Hepatocellular cancer, B. Non-small Cell Carcinoma of Lung, C. Gastric cancer, D. Nasopharyngeal cancer
B: Non-small Cell Carcinoma of Lung
Answer: B: Non-small Cell Carcinoma of Lung 
Explanation: 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.