PPSC Past Paper Sub inspector Punjab Police (Service Quota) 2019 Solved MCQs, Computer MCQs, Electronic Record Keeping MCQs, PPSC Solved Past Papers MCQsWhich of the following is not an Application Software?A. Windows NT B. Page Maker C. WinWord XP D. Photoshop Why is the Ozone important for mankind?A man can do a piece of work in 5 days but with the help of his son he can do it in 3 days. In what time can the son do it alone?