PPSC Past Paper Sub inspector Punjab Police 2019 Solved MCQs, Computer MCQs, Electronic Record Keeping MCQs, PPSC Solved Past Papers MCQsTo copy a picture of the screen to the clipboard use?A. Alt key B. Shift key C. Print screen key D. None of these The ratio 35:84 in simplest form is?______ is used to transmit digital data over telephone lines?