Correct option is A
In MS Excel, the Active cell is the cell that is currently selected or highlighted. It is indicated by a bold boundary, which differentiates it from other cells in the worksheet. The active cell is where data will be entered or edited, and its address is shown in the Name box.
Relative cell, Passive cell, and Mixed cell are not standard terms used to describe cell properties in MS Excel.
Thus, the correct answer is Active cell.