PPSC Past Paper Assistant Director Local Govt. & Community Development 2018 Solved MCQs, General Knowledge MCQs, PPSC Past Paper Junior Clerk S & GD 2018 solved MCQs, PPSC Solved Past Papers MCQsHuman heart consists of how many chambers?A. 2 B. 3 C. 1 D. 4 Study of spiders?Which gas is commonly used in balloons and airships?
