Question Help! What version display port I need?

This mess my brain more after reading. Can you give me short answer to my question please.Can i use 1.1 or i need 1.2?

Edit:
I understed 1.1 will work 144 on 1080p but dont know about g-sync to free sync monitor
3.3.4. Does This DP Cable Support [Feature XYZ]?

All DisplayPort features work on any DisplayPort cable
.

You do not need any kind of special DisplayPort cable for FreeSync/G-Sync to work, or for inline audio or HDR, or anything else. All features work on all cables.