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: Medicine
[{'content': 'All the following can cause GIT cancers except \nSelect and explain. \nA. Hepatitis B virus, B. EBV, C. HIV, D. H. pylori', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]