Fifth Caliph of Islam A) Hazrat Abdur Rehman bin Aouf RA B) Hazrat Umar bin Abdul Aziz RA C) Hazrat Anas bin Malik RA D) None of these Related MCQs: In June 2020, researchers have observed the fifth state of matter in space. What is the name of the fifth state of matter? Give the name of Ummayad Caliph whose four sons also became Caliph after him? A farmer divides his herd of cows among his four sons so that first son gets one half of the herd, the second son one-fourth, the third son one fifth and the fourth son 7 cows. the total number of cows in the herd is? In 2020, which country became the fifth largest country in the world by population?