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?

(N/A) : Viral $DNA$ is produced by reverse transcriptase.
$(B)$: New viral $RNA$ is produced by the infected cell.
$(b)$ $A$ virus is called a retrovirus because it possesses the enzyme reverse transcriptase,which allows it to synthesize $DNA$ from an $RNA$ template through a process known as reverse transcription.
$(c)$ Yes,the infected cell can continue to survive and function while the viruses are being replicated and released from it.