$AIDS$ Day is observed on:

Transmission of $HIV$ occurs by:
$I.$ Sexual contact with an infected person
$II.$ Transfusion of contaminated blood
$III.$ Sharing infected needles
$IV.$ From an infected mother to her baby through the placenta
Which of the statements given above are correct?

Which of the following is $NOT$ a mode of transmission for $AIDS$?

Which of the following is a preventive measure for $AIDS$?

Assertion: $HIV$ infected persons are prone to opportunistic diseases.
Reason: Immune system weakens during $HIV$ infection.

The $ELISA$ test is used for the diagnosis of