Which of the following is not an output device

i would say 3 because windows is the best but vista doesnt do updates anymore

answer; ( blue box );

answer is:

a). backstage view

explanation:

backstage view is the area where files and data about them is managed— creating, saving, printing, sending to others, inspecting for hidden metadata or personal information, and setting options. so in this way we can add many things to our document swiftly.

i hope you get the idea.