Oooo actually he is likely to be iii) then - FUSAG is the First United States Army Group:

"Operation Bodyguard was designed to confuse the Axis high command as to Allied intentions during the lead-up to the invasion... The Allied story for FUSAG was that the army group, based in south-east England, would invade the Pas de Calais region several weeks after a smaller diversionary landing in Normandy."

Pujol's code name was GARBO (for the British) or ARABEL (for the Germans).