What version of DirectX api or version the game application is using, while it's running?

Do you wonder what DX version or api your game/graphics application is using and you have no clue how to check it?

Here is the way,
1. Download Process explorer 
2. Launch Process Explorer > View > Lower Pane View > DLLs. 
3. Run your game, switch back to Process Explorer, and select executable of your application.
4. Look which libraries it has loaded. 
For DX11, library will d3d11.dll and for dx12 its d3d12.dll.

Thank you.