Note the functionalities of various background processes:

$1$: Perform recovery at instance startup.

$2$: Free the resources used by a user process when it fails.

$3$: Cleanup the database buffer cache when a process fails.

$4$: Dynamically register database services with listeners.

$5$: Monitor sessions for idle session timeout.

$6$: Cleanup unused temporary segments.

$7$: Record the checkpoint information in control file.

Which option has the correct functionalities listed for a background process?

A$.$ Checkpoint $($CKPT$)$: $1,2,5$

B$.$ System Monitor $($SMON$)$: $1,6$

C$.$ Process Monitor $($PMON$)$: $4,6,7$

D$.$ Database Writer $($DBWR$)$: $1,3,4$