Excel version reference: 20 10
1. Select a data area, click Formula-Define Name-Create Based on Selection, check the first line, and click OK.
2. Select cell E2, data-data validity, series and source, A 1: C 1, and then confirm.
3. Select F2 cell, data-data validity, series and source, enter the formula: = indirect ($E$2), and then confirm.
4. Select data and test the effect (OK)