PPSC Past Paper Provincial Management Service 2018 Solved MCQs, Computer MCQs, PPSC Solved Past Papers MCQsWhich of the following is not a valid size of a FLOPPY DISK?A. 5 1/2″ B. 5 1/4″ C. 3 1/2″ D. 8″ Silicon Valley is situated in?The Nobel Prize for Economic was introduced in?