Mac Boot Option not Showing Base System
I never saw Base system on any of my Macs since 2008. Recovery partition is not created in all cases (for example, if you used PGP WDE or other disk encryption software or you installed your OS from the USB key created by a Disk Utility). You may recreate a recovery partition though. See http://hints.binaryage.com/recover-lost-recovery-hd-for-filevault/ (too long to quote here).