This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hepatitis, Subject name: Medicine
Which of the following is the most common cause of transfusion associated hepatitis? 
Select and explain. 
A. Hepatitis A, B. Hepatitis B, C. Hepatitis C, D. Hepatitis D
B: Hepatitis B
Answer: B: Hepatitis B 
Explanation: Hepatitis B- is the most common cause of transfusion associated hepatitis