What is the genetic material present in $HIV$?

The presence of $HIV$ can be detected by these methods:
$(i)$ $ELISA$
$(ii)$ $WB$ $Test$ (Western Blot)
$(iii)$ $VB$ $Test$
$(iv)$ $ALISA$

$HIV$,which causes $AIDS$,first starts destroying:

Which of the following statements is incorrect regarding $AIDS$?

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

Which enzyme synthesizes $DNA$ from $RNA$ in $HIV$?