PPSC Past Paper Assistant Planning & Development 2019 Solved MCQs, General Knowledge MCQs, PPSC Solved Past Papers MCQsPakistan Steel Mills was established on?A. 1971 B. 1972 C. 1973 D. 1974 Who was the Prime Minister of Pakistan when our first Constitution of 1956 adopted?I spend 20 hours to clean my garden. How long will it take if 4 people (with the same efficiency) come to join me?