PPSC Past Paper Deputy Accountant Finance Department-2019 Evening, Islamic Studies MCQs, PPSC Solved Past Papers MCQsWhich among the four Pious Caliphs of Islam had the longest reign?A. Hazrat Abu Bakr R.A B. Hazrat Umer R.A C. Hazrat Usman R.A D. Hazrat Ali R.A 22 April is observed every year internationally as?Complete the Proverb: “Birds of a feather ______ together”?