PPSC Past Paper Elementary School Educator General in Labour & Human Resource Department. 2019 Solved MCQs, General Knowledge MCQs, PPSC Solved Past Papers MCQsWhen did 1973 constitution was enforced?A. 23rd March B. 15th May C. 14th August D. None of these In which Constitution bicameralism introduced?Who was the PM after Zafar Ullah Jamali in 2004?