Hi Vijay,

If you go to Site Administration > Notifications you should see both the Totara version and the version of moodle that it's based on. The current release shows:

Version 2.2.1 (Build: 20120821.00)

under the big totara logo which is the totara version then lower down:

Moodle 2.2.4 (Build: 20120706)

Which is the moodle version that this version of Totara is based on.

Thanks,

Simon