A. Umar ibn al-Khattab
B. Ali ibn Abi Talib
C. Khalid ibn al-Walid
D. Muawiyah ibn Abi Sufyan
Answer: Umar ibn al-Khattab
A. Umar ibn al-Khattab
B. Ali ibn Abi Talib
C. Khalid ibn al-Walid
D. Muawiyah ibn Abi Sufyan
Answer: Umar ibn al-Khattab
Additional Information: Umar ibn al-Khattab's caliphate marked significant territorial expansion for the Islamic empire.
Subjects: Famous Islamic Personalities, Islamiyat