useradd: Unknown group

[unix syzadmin]

Hi,

I am getting the following error for creating a user. Please suggest.

bngddem3:~ # useradd -m -d /home/rrao -s /bin/bash -g pncerts rrao
useradd: Unknown group `dialout'.
useradd: Unknown group `uucp'.
useradd: Unknown group `video'.
useradd: Unknown group `audio'.
useradd: Unknown group `pncerts'.

Thanks & Regards,
-GnanaShekar-