PPSC Past Paper Assistant Director Local Govt. & Community Development 2018 Solved MCQs, Everyday Science MCQs, PPSC Past Paper Junior Clerk S & GD 2018 solved MCQs, PPSC Solved Past Papers MCQsthe lens in the human eye is?A. convex lens B. concave lens C. piano concave lens D. none of these Solar eclipse occurs when?Blood cells are produced by in the human body?