Which is not a valid Zoom option? a.Zoom Extents b.Zoom Previous c.Zoom Next d.Zoom Window

Zoom next is not valid option :)

C) Zoom next is not an AutoCad command

http://www.autocadcentral.com/tutorials/Lesson%203/lesson3.htm

Zoom Commands Here we'll take a quick look at the various zoom commands available, and their uses. This tutorial requires you to download the AutoCAD drawing file Lesson3.dwg

Lesson3.dwg (AutoCAD2000 File Version)lesson3r14.dwg (AutoCAD R14 File Version)

1) Load up the file, the drawing is of a steel plate with6 mounting screws.To see all of the available zoom commands, the zoom toolbar needs to be visible. Load in the zoom toolbar (For those who can't remember: Go to the 'view' drop down menu, then select toolbars. Check the 'zoom' box then choose close. Move the toolbar to a convenient location)

AutoCAD's zoom command toolbar:Commands (From Left to Right):Zoom Window : Select a window over the location to zoom into. AutoCAD will zoom in close to the object including everything within the selection box. Zoom Dynamic : Enables the user to set the size of a standard zoom window type box, then use this box to select zoom in views of the drawing with this box with clicks of the mouse button. (Not as powerful as zoom window in my opinion)

Zoom Scale : Enables the user to zoom into the drawing to a known scale (referred to as an 'XP value'). This type of zoom is not required until you are ready to plot the drawing. Don't worry, you're not expected to understand the use of this command yet! It will be covered in the paperspace/layout view tutorial.

Zoom Centre : Specify a centre point, then a radius and AutoCAD will centre this view to fit your screen.

Zoom In : Pretty simple, zooms into the drawing slightly by each click! Quick 'n' simple!

Zoom Out : Same as above, but zoom out by each click.

Zoom All : Zooms to the extents of the drawing limits. Don't worry about this just yet.

Zoom Extent : This is a very useful command. One press will zoom to the extent of the entire drawing enabling a very quick overview of the project and an easy starting point to zoom into a more precise area of the drawing with one of the above tools.

d.zoom window is a correct answer

Zoom next is not a valid option to zoom any object........................... Thanks for inviting and MS. Elke woofter answer is very detailed regarding the "zoom"  option.