DX10 in Unity 5

Questions & Answers
1

I have an DX9,DX10 and DX11 on my computer.I also have a Unity 5.
Question: How can I turn on the DX10 in Unity5? In Player settings I can only turn on/off DX11.After turning off DX11 as a result I have turned on the DX9,but not DX10.
Thanks.

2

As far as i know, it is either DX9, or DX11.