How long was the period of Abbasid dynasty?

A ) 408

B ) 508 ✅

C ) 698

D ) 315


Explanation: From 750 - 1258 1st ruler: As-Suffah Longest tenure: Rashidun.Rashidin -30 years Umayyad -100 years Abbasid - 500 years Ottoman Empire - 600 years.