What is the full form of $HIV$?

Which enzyme helps in the replication of viral $RNA$ genome into viral $DNA$ within macrophages?

In the given figure,what do $A$ and $B$ represent respectively?

$AIDS$ is caused by the reduction of:

$A$ doctor,while operating on an $HIV$ patient,accidentally cut himself with a scalpel. He comes to you,suspecting that he may have contracted the virus. Which test will you advise him to perform to rule out or confirm his suspicion?

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