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 of the following infections may be transmitted via blood transfusion, except - \nSelect and explain. \nA. Parvo B-19, B. Dengue virus, C. Cytomegalo virus, D. Hepatitis G virus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]