✔ Correct Answer: C. Umar Ibn al-Khattab
The correct answer to the question “Who was the only Caliph to rule during the entire period of the Rashidun Caliphate (632-661 AD) without facing any internal civil wars?” is Umar Ibn al-Khattab. This question belongs to Islamic Studies. Practice the related questions below to master this topic for your FPSC, PPSC and NTS tests.