Which one of the following statements is true with respect to Printer Daemon process?

Which one of the following statements is true with respect to Printer Daemon process?

1. a) The printer daemon of Operating System runs in kernel mode.
2. b) Jobs in the printer daemon queue cannot be removed once inserted.
3. c) Printer daemon application runs only when it is printing.
4. d) Printer daemon runs as a service in Operating System