In Excel, a combination of a column letter and a row number (e.g., A1 or B4) is called a:

In Excel, a combination of a column letter and a row number, such as A1 or B4, is known as a Cell Address or Cell Reference. This unique identifier pinpoints the exact location of a single cell within a worksheet, allowing users to input data, apply formatting, and reference specific values in formulas. It's a foundational concept for navigating and manipulating data in spreadsheets.

• Cell Pointer (B) is incorrect; this refers to the highlighted border around the currently active cell.
• Range (C) is incorrect; a range refers to a selection of two or more cells (e.g., A1:B4), not the address of a single cell.
• Formula (D) is incorrect; a formula is an expression that performs calculations, often utilizing cell addresses, but it is not the address itself.