What is the full form of the $WB$ test?

Statement $P$: $HIV$ contains a $DNA$ molecule as its genetic material.
Statement $Q$: $AIDS$ is a fatal deficiency disease caused by immune system impairment.

$AIDS$ spreads through:

Which enzyme is responsible for integrating the viral $DNA$ (formed after reverse transcription of viral $RNA$) into the host cell $DNA$?

The $HIV$ virus attacks which cells of the immune system?

In the given flow chart,the replication of a retrovirus in a host cell is shown. Observe it carefully and fill in the blanks $A, B$,and $C$.