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: Social & Preventive Medicine
Case notification under international health regulations is done for which of the following: September 2009 
Select and explain. 
A. Hepatitis B, B. HIV, C. Yellow fever, D. All of the above
C: Yellow fever
Answer: C: Yellow fever 
Explanation: Ans. C: Yellow fever