World AIDS Day is Celebrated on
Option 4 is the right answer.
World AIDS Day is one of the eight official global public health campaigns marked by the World Health Organization (WHO)
It is celebreated to aware the people about HIV infection worldwide.
As of 2013, AIDS has killed more than 36 million people worldwide (1981-2012), and an estimated 35.3 million people are living with HIV, making it one of the most important global public health issues in recorded history.