The technique used to detect $HIV$ in a suspected $AIDS$ patient during the asymptomatic stage is

How many types of enzymes are present in the core protein of the $HIV$ virus?

Assertion $A$: $AIDS$ is a severe,incurable,infectious,and fatal disease.
Reason $R$: $HIV$ causes deficiency of the immune system in the body.
Which option is correct for Assertion $A$ and Reason $R$?

$AIDS$ is caused by which type of virus?

The World Health Organization has started a number of programmes to prevent the spreading of $HIV$ infection.
Few such steps include:
$I.$ Ensuring the use of disposable needles and syringes.
$II.$ Free distribution of condoms.
$III.$ Advocating safe sex.
$IV.$ Controlling drug abuse.
Which of the steps given above are correct?

Which individuals are at higher risk of getting $HIV$ infection?