Concept:Comments in MS Excel are short notes attached to a cell to provide extra information.
Explanation:In MS Excel, a comment is stored with a specific cell.
A small red indicator usually appears on the corner of the cell to show that a comment exists.
When you hover the mouse pointer over that cell, the comment text appears as a small pop-up tip beside the cell.
Because this tip is linked to the cell and appears on pointing, such comments are commonly known as cell tips.
Thus, among the given options, comments used in cells are called cell tips.
Answer:A. cell tip