This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical Illness Complicating Pregnancy, Subject name: Gynaecology & Obstetrics
A baby is born to a HBsAg positive mother. Which of the following is required for prevention of mother to child transmission of hepatitis B? 
Select and explain. 
A. HBIG with first dose of Hep B vaccine at bih followed by routine hep B vaccination, B. Hepatitis B vaccine at 0,1,6 months, C. HBIG and lamivudine prophylaxis, D. Hepatitis B vaccine and lamivudine prophylaxis
A: HBIG with first dose of Hep B vaccine at bih followed by routine hep B vaccination
Answer: A: HBIG with first dose of Hep B vaccine at bih followed by routine hep B vaccination 
Explanation: A neonate born to a mother with HBsAg positive should be given HBIG along with first dose of hepatitis B vaccine followed by routine vaccination after 1 and 6 months.