MS Excel
By default Excel provides 3 worksheets. You need only two of them, how will you delete the third one?

Both of above
Right click on Sheet Tab of third sheet and choose Delete from the context menu
Click on Sheet 3 and from Edit menu choose Delete
None of above

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MS Excel
How do you delete a column?

Select the row heading you want to delete and select Edit>Delete from the menu
Select the column heading you want to delete and select Insert Delete from the menu
Right click the column heading you want to delete and select delete from the shortcut menu
Select the column heading you want to delete and select the Delete Row button on the standard toolbar

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