Which of the following is used to diagnose $AIDS$?

$HIV$ can be transmitted through which of the following?

In which of the following,$HIV$ replicates and produces its progeny viruses?

Which of the following does $NOT$ spread $AIDS$?

Arrange the following statements regarding $AIDS$ in the correct chronological order of the infection process:
$(1)$ After entering the individual's body,the $HIV$ virus enters macrophages,where the viral $RNA$ genome replicates into viral $DNA$ with the help of the reverse transcriptase enzyme.
$(2)$ $HIV$ enters helper $T$-lymphocytes.
$(3)$ $HIV$ has an $RNA$ molecule as its genetic material.
$(4)$ Newly formed viruses are released into the blood and attack other helper $T$-lymphocytes.
$(5)$ Viral $DNA$ is incorporated into the host cell's $DNA$.

Hepatitis-$B$ and $HIV$ spread through: