Extreme4 8 pin atx 12v

Gday Im on my first buil
I have a Asrock extreme 4 and Im trying to hook it upto a Antec High current pro 750w. The Antec is part modular.
The asrock has a 8 pin 12v ATX power connector, that is meant for a 8 pin ATX plug.
The Antec has a few 2 typys of 8pin plugs
A ( 6 + 2 ) that has PCIE written on the plugand joins a antec socket that says PCIE
B (solid 8 pin) that has CPU written on the plug and plugs into antec socket that says CPU
C ( 4 + 4 ) that has CPU written on it and is hard wired Into the Antec
I m guessing the answer is B or C ?
Your help is much apreciated