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
A person is screened for blood Donation. Which of the following serology is safe for Blood donation. 
Select and explain. 
A. Anti HBsAg positive, B. HBsAg positive, C. Anti HBC positive (IgM), D. HBcAg positive
A: Anti HBsAg positive
Answer: A: Anti HBsAg positive 
Explanation: Answer is A (Anti HBsAg positive) Presence of Anti HBsAg positive status indicates either immunization with HBs Ag or Hepatitis B in the remote past with complete recovery such patients are considered safe fin- blood transfusion. HbsAg Anti-HBs Anti-HBc HBeAg Anti-HBe Interpretation - + IgG - +/- Recovery from hepatitis B - + - - - 1. Immunization with HbsAg (after vacciniation) 2. Hepatitis B in the remote past (?) 3. False-positive