PPSC Past Paper Social Security Officer in PESSI – Labour and Human Resource Department 2018 Solved MCQs, General Knowledge MCQs, PPSC Solved Past Papers MCQsThe people of Oman are linked with which occupation?A. Oil refinery B. Agriculture C. Plastics D. Complex Machinery The total number of great lakes in the world are?Ayat-ul-Kursi is in which Surah?