Symptoms like skin blood vessel cancer (Kaposi's sarcoma) and swollen lymph nodes are observed in which of the following?

Which of the following symptoms is $NOT$ observed in $ARC$ ($AIDS$-Related Complex)?

What does '$A$' represent in the given figure?

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

Which cells does the $HIV$ virus primarily target in the blood to cause infection?

Consider the following statements about $AIDS$.
$I.$ $AIDS$ patient become easily infected by bacteria,viruses and even parasites.
$II.$ The person is unable to protect himself against any infection.
$III.$ National $AIDS$ Control Organisation $(NACO)$ and non-governmental organizations are trying their best to educate people about $AIDS$.
Which of the statements given above are correct?