...Installed ArcGIS version is '10.1'
...
... ...File Geodatabase release: '10.0'
...Installed ArcGIS version is '10.1'
...
... ...File Geodatabase release: '10.0'
Using ArcCatalog, right-click on your dataset, select Properties and look under the tab General.
And this is 10.1.
No other information.