The correct answer is Turks and Persians.
The two groups which Arabs shared power under Abbasid dynasty were Turks and Persians.
Abbasid dynasty is termed as the Islamic caliphates which was ranked the third to succeed prophet Muhammad.
Abbasid Dynasty was known to descend from uncle Muhammad.
Kufa is the place the abbasid caliphate centred their government first.
The abbasid alienated Iranian and non Arab bureaucrats despite of their initial cooperation.