Which of these key are used to apply outline border to the selected cell in MS Excel?

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Which of these key are used to apply outline border to the selected cell in MS Excel? Answer: CTRL+SHIFT+ &

In Microsoft Excel, this key combination applies a standard outline border to the outside edges of the currently selected cell or range of cells. When you press Ctrl + Shift + & (the Ampersand sign), Excel immediately draws a thin line around the perimeter of your selection.