In the given flow diagram,the replication of a retrovirus in a host is shown. Observe and answer the following questions.
$(a)$ Fill in $(A)$ and $(B)$.
$(b)$ Why is the virus called a retrovirus?
$(c)$ Can the infected cell survive while viruses are being replicated and released?

Which method is used for the diagnosis of $AIDS$?

In an $HIV$ infected person,the $HIV$ produced in macrophages enters which cells to replicate and produce its progeny?

Which diagnostic test is suggested for patients suspected of having $AIDS$?

What is the nucleic acid present in $HIV$?

How many of the following statements regarding the transmission of $AIDS$ are correct?
$(a)$ $AIDS$ is transmitted by using the belongings of an infected person.
$(b)$ It can be transmitted through organ transplantation.
$(c)$ It can be transmitted through blood donation.
$(d)$ It can be transmitted from mother to child through the placenta.
$(e)$ It spreads through droplet infection via sneezing and coughing.
$(f)$ It is transmitted from a breastfeeding mother to her child.
$(g)$ It can be transmitted through the saliva of a patient.