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 viruses may be transmitted by blood transfusion Except: \nSelect and explain. \nA. Parvovirus B-19, B. Hepatitis G, C. Epstein Bar virus, D. Cytomegalovirus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Answer is None or C (None >> EBV) Parvovirus B-I9, Hepatitis G, Cytomegalovirus and Epstein Bar virus may all be transmitted by blood transfusion. Transfusion transmitted EBV is however a rare event and may hence be selected as the single best answer by exclusion. EBV and Blood Transfusion (Morbidity following EBV Transfusion is Rare) `EBV infection may also follow blood transfusion or marrow transfusion but these are rare events'-Ananthanarayan 8th/131 `Although transfusion associated EBV is rare, it is neveheless well documented'", 'role': 'assistant'}]