Question: Name the fifth considered Caliph of Islam.

Answer: Hazrat Caliph Umar bin Abdul Aziz tops that list. He is considered one of the finest rulers in Muslim history, second only to the four rightly guided caliphs — Abu Bakr, Umar, Uthman and Ali (RA). In fact, in some circles, he is affectionately referred to as the fifth and the last caliph of Islam.