Who is recognized as the fifth pious Caliph of Islam:

Who is recognized as the fifth pious Caliph of Islam:
Answer: Hazrat Umar Bin Abdul Aziz RA

Hazrat Umar Bin Abdul Aziz is honored as the fifth rightly guided Caliph because of his just and reformist rule. The phrase recognized as shows his acceptance by historians and scholars. His leadership style set a model for fairness and governance.