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
All of the following infections may be transmitted via blood transfusion, except - 
Select and explain. 
A. Parvo B-19, B. Dengue virus, C. Cytomegalo virus, D. Hepatitis G virus
B: Dengue virus
Answer: B: Dengue virus 
Explanation: None