This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Isolation period of Hepatitis A- 
Select and explain. 
A. 1 week, B. 2 week, C. 3 week, D. 4 week
C: 3 week
Answer: C: 3 week 
Explanation: .