Key used to To fill to the right
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Ctrl + Shift + R
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Ctrl + Backspace
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Ctrl + R
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F7
C
Correct answer
Explanation
Ctrl + R is the standard keyboard shortcut in Microsoft Excel and other spreadsheet applications to fill right. This copies the contents or formula from the cell(s) to the left into the current cell(s) to the right. It's the horizontal equivalent of Ctrl + D which fills down.