PPSC Past Paper Labour Inspector(BS-14) 2019 Solved MCQs, Islamic Studies MCQs, PPSC Solved Past Papers MCQsGive the name of Ummayad Caliph whose four sons also became Caliph after him?A. Abdul Maalik B. Muawiyah C. Marwan D. None of these Carbon Dioxide was discovered by?What lets you to create new presentation by selecting ready-made font color and graphics effects in PowerPoint?