This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Permanent carrier for HBV is - 
Select and explain. 
A. > 6 months, B. > 1 month, C. > 1 year, D. > 2 year
A: > 6 months
Answer: A: > 6 months 
Explanation: <p> The persistent carrier state has been defined as the presence of HBsAg for more than 6 months. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:213. <\p>