This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncology, Subject name: Medicine
[{'content': 'All of the following are carcinogenic except- \nSelect and explain. \nA. H pylori, B. Hepatitis B virus, C. EB virus, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: H pylori causes gastric carcinoma Hepatitis B causes hepatocellular carcinoma EB virus causes nasopharyngeal carcinoma Ref Harrison 20th edition pg 536', 'role': 'assistant'}]