Note the following functionalities of various background processes:
1.Record the checkpoint information in data file headers.
2.Perform recovery at instance startup.
3.Cleanup unused temporary segments.
4.Free the resources used by a user process when it fails.
5.Dynamically register database services with listeners.
6.Monitor sessions for idle session timeout.
Which option has the correct functionalities listed for a background process?
A. Archiver Process (ARCn): 1, 2, 5
B. System Monitor Process (SMON): 1, 4, 5
C. Process Monitor Process (PMON): 4, 5, 6
D. Database Writer Process (DBWn): 1, 3, 4
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