What does a workbook in Excel contain?

A collection of worksheets

The correct answer is option 2- A collection of worksheets.

A file in Excel is known as a “Workbook”. A workbook is a collection of a number of “Worksheets”. By default, three sheets, namely Sheet 1, Sheet 2, and Sheet 3 are available to users. At a time, only one worksheet can be made as “Active Worksheet” and that worksheet is available to a user for carrying out operations. An active worksheet’s name will be shown in bold letters in the “Sheet Tab” at the bottom left of the screen.