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: Microbiology
Australia antigen is associated with: 
Select and explain. 
A. Hepatitis B surface antigen in acute hepatitis, B. AIDS, C. Chronic leukemia, D. Basal cell carcinoma
A: Hepatitis B surface antigen in acute hepatitis
Answer: A: Hepatitis B surface antigen in acute hepatitis 
Explanation: None