Pandaria Frost or Unholy for PVP

[Thron]

I just finish leveling a dk and want to do pvp what spec shoud i use in pvp?

[Kemii]

If you have a pocket healer for BGs.. Frost.
Anything else... Unholy.

Frost is so much of a glass cannon you require to have your own healer. Unholy has much better survivability, single target destruction and just better within a PvP environment.