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
A dentist who got infected with Hepatitis B has recovered from it for last 3 months. His laboratory tests are normal, but he is not allowed to treat patients. He is known as? 
Select and explain. 
A. Active carrier, B. Inactive carrier, C. Paradoxical carrier, D. Convalescent carrier
D: Convalescent carrier
Answer: D: Convalescent carrier 
Explanation: None